/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/cohendiv-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:09:14,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:09:14,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:09:14,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:09:14,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:09:14,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:09:14,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:09:14,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:09:14,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:09:14,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:09:14,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:09:14,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:09:14,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:09:14,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:09:14,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:09:14,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:09:14,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:09:14,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:09:14,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:09:14,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:09:14,915 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:09:14,941 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:09:14,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:09:14,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:09:14,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:09:14,944 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:09:14,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:09:14,944 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:09:14,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:09:14,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:09:14,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:09:14,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:09:14,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:09:14,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:09:14,945 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:09:14,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:09:14,945 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:09:14,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:09:14,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:09:14,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:09:14,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:09:14,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:09:14,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:09:14,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:09:14,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:09:14,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:09:14,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:09:14,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:09:14,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:09:14,947 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:09:15,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:09:15,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:09:15,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:09:15,203 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:09:15,203 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:09:15,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound5.c [2021-05-02 14:09:15,254 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b73a994ed/3f56dbf380c2426bb865324323507964/FLAG187583b80 [2021-05-02 14:09:15,624 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:09:15,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound5.c [2021-05-02 14:09:15,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b73a994ed/3f56dbf380c2426bb865324323507964/FLAG187583b80 [2021-05-02 14:09:15,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b73a994ed/3f56dbf380c2426bb865324323507964 [2021-05-02 14:09:15,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:09:15,647 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:09:15,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:09:15,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:09:15,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:09:15,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:09:15" (1/1) ... [2021-05-02 14:09:15,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@705f5200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:09:15, skipping insertion in model container [2021-05-02 14:09:15,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:09:15" (1/1) ... [2021-05-02 14:09:15,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:09:15,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:09:15,760 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/cohendiv-ll_unwindbound5.c[576,589] [2021-05-02 14:09:15,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:09:15,790 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:09:15,837 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/cohendiv-ll_unwindbound5.c[576,589] [2021-05-02 14:09:15,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:09:15,860 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:09:15,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:09:15 WrapperNode [2021-05-02 14:09:15,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:09:15,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:09:15,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:09:15,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:09:15,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:09:15" (1/1) ... [2021-05-02 14:09:15,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:09:15" (1/1) ... [2021-05-02 14:09:15,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:09:15" (1/1) ... [2021-05-02 14:09:15,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:09:15" (1/1) ... [2021-05-02 14:09:15,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:09:15" (1/1) ... [2021-05-02 14:09:15,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:09:15" (1/1) ... [2021-05-02 14:09:15,892 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:09:15" (1/1) ... [2021-05-02 14:09:15,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:09:15,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:09:15,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:09:15,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:09:15,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:09:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:09:15,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:09:15,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:09:15,952 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:09:15,952 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:09:15,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:09:15,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:09:15,952 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:09:15,952 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:09:15,953 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:09:15,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:09:15,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:09:15,953 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:09:15,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:09:15,954 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:09:15,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:09:15,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:09:15,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:09:15,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:09:15,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:09:15,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:09:16,169 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:09:16,169 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:09:16,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:09:16 BoogieIcfgContainer [2021-05-02 14:09:16,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:09:16,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:09:16,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:09:16,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:09:16,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:09:15" (1/3) ... [2021-05-02 14:09:16,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c67f935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:09:16, skipping insertion in model container [2021-05-02 14:09:16,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:09:15" (2/3) ... [2021-05-02 14:09:16,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c67f935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:09:16, skipping insertion in model container [2021-05-02 14:09:16,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:09:16" (3/3) ... [2021-05-02 14:09:16,175 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound5.c [2021-05-02 14:09:16,178 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:09:16,186 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:09:16,204 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:09:16,225 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:09:16,225 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:09:16,225 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:09:16,226 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:09:16,226 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:09:16,226 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:09:16,226 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:09:16,226 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:09:16,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 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 14:09:16,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 14:09:16,242 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:16,242 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:09:16,242 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:16,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:16,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1588022502, now seen corresponding path program 1 times [2021-05-02 14:09:16,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:16,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007914681] [2021-05-02 14:09:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:09:16,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:09:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:09:16,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:09:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:09:16,430 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 14:09:16,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:16,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007914681] [2021-05-02 14:09:16,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007914681] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:09:16,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:09:16,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:09:16,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533275176] [2021-05-02 14:09:16,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:09:16,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:16,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:09:16,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:09:16,444 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 14:09:16,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:16,540 INFO L93 Difference]: Finished difference Result 68 states and 101 transitions. [2021-05-02 14:09:16,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:09:16,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 17 [2021-05-02 14:09:16,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:16,550 INFO L225 Difference]: With dead ends: 68 [2021-05-02 14:09:16,551 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 14:09:16,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:09:16,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 14:09:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 14:09:16,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 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 14:09:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-02 14:09:16,579 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-05-02 14:09:16,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:16,580 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-02 14:09:16,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 14:09:16,580 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-02 14:09:16,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 14:09:16,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:16,582 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 14:09:16,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:09:16,583 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:16,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:16,583 INFO L82 PathProgramCache]: Analyzing trace with hash 766070672, now seen corresponding path program 1 times [2021-05-02 14:09:16,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:16,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226568019] [2021-05-02 14:09:16,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:16,617 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:16,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211032678] [2021-05-02 14:09:16,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:09:16,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:09:16,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:16,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:16,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:16,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:16,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:16,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:16,799 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 14:09:16,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:16,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226568019] [2021-05-02 14:09:16,802 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:16,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211032678] [2021-05-02 14:09:16,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211032678] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:09:16,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:09:16,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 14:09:16,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546282568] [2021-05-02 14:09:16,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 14:09:16,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:16,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 14:09:16,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:09:16,805 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 14:09:16,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:16,832 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-02 14:09:16,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 14:09:16,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 18 [2021-05-02 14:09:16,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:16,835 INFO L225 Difference]: With dead ends: 42 [2021-05-02 14:09:16,835 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:09:16,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:09:16,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:09:16,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:09:16,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 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 14:09:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 14:09:16,844 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-05-02 14:09:16,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:16,845 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 14:09:16,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 14:09:16,845 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 14:09:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 14:09:16,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:16,845 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 14:09:17,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:09:17,057 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:17,058 INFO L82 PathProgramCache]: Analyzing trace with hash 767560222, now seen corresponding path program 1 times [2021-05-02 14:09:17,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:17,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230771249] [2021-05-02 14:09:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:17,066 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:17,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091100318] [2021-05-02 14:09:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:09:17,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:09:17,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:17,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:17,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:17,246 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 14:09:17,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:17,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230771249] [2021-05-02 14:09:17,246 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:17,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091100318] [2021-05-02 14:09:17,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091100318] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:09:17,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:09:17,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 14:09:17,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623033970] [2021-05-02 14:09:17,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:09:17,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:17,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:09:17,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:09:17,248 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 14:09:17,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:17,342 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-02 14:09:17,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:09:17,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 14:09:17,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:17,344 INFO L225 Difference]: With dead ends: 45 [2021-05-02 14:09:17,344 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 14:09:17,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:09:17,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 14:09:17,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 14:09:17,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 14:09:17,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 14:09:17,352 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2021-05-02 14:09:17,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:17,352 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 14:09:17,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 14:09:17,352 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 14:09:17,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:09:17,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:17,353 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 14:09:17,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:17,569 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:17,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1016228092, now seen corresponding path program 1 times [2021-05-02 14:09:17,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:17,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240551226] [2021-05-02 14:09:17,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:17,586 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:17,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046066663] [2021-05-02 14:09:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:09:17,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:09:17,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:17,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:17,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:17,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:17,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:17,697 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 14:09:17,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:17,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240551226] [2021-05-02 14:09:17,697 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:17,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046066663] [2021-05-02 14:09:17,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046066663] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:09:17,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:09:17,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 14:09:17,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321907532] [2021-05-02 14:09:17,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:09:17,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:17,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:09:17,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:09:17,699 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:09:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:17,776 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-05-02 14:09:17,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:09:17,777 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 14:09:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:17,777 INFO L225 Difference]: With dead ends: 58 [2021-05-02 14:09:17,777 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 14:09:17,778 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:09:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 14:09:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 14:09:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 14:09:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-02 14:09:17,784 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2021-05-02 14:09:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:17,784 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-02 14:09:17,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:09:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-02 14:09:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 14:09:17,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:17,785 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, 1, 1, 1] [2021-05-02 14:09:18,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:18,005 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:18,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:18,005 INFO L82 PathProgramCache]: Analyzing trace with hash 2019703110, now seen corresponding path program 1 times [2021-05-02 14:09:18,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:18,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259258692] [2021-05-02 14:09:18,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:18,013 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:18,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424435660] [2021-05-02 14:09:18,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:09:18,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:09:18,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:18,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:18,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:18,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:18,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:18,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:18,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:09:18,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:18,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259258692] [2021-05-02 14:09:18,183 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:18,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424435660] [2021-05-02 14:09:18,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424435660] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:09:18,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:09:18,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 14:09:18,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633603526] [2021-05-02 14:09:18,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:09:18,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:18,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:09:18,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:09:18,185 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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), 2 states have call successors, (4) [2021-05-02 14:09:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:18,301 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2021-05-02 14:09:18,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:09:18,302 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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), 2 states have call successors, (4) Word has length 31 [2021-05-02 14:09:18,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:18,304 INFO L225 Difference]: With dead ends: 83 [2021-05-02 14:09:18,304 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 14:09:18,305 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:09:18,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 14:09:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-05-02 14:09:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:09:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-05-02 14:09:18,334 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2021-05-02 14:09:18,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:18,334 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-05-02 14:09:18,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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), 2 states have call successors, (4) [2021-05-02 14:09:18,335 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-05-02 14:09:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 14:09:18,335 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:18,335 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 14:09:18,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:18,536 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:18,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:18,537 INFO L82 PathProgramCache]: Analyzing trace with hash 202176206, now seen corresponding path program 1 times [2021-05-02 14:09:18,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:18,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810682025] [2021-05-02 14:09:18,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:18,544 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:18,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588768763] [2021-05-02 14:09:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:09:18,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:09:18,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:18,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:18,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:18,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:18,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:18,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:18,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:18,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:18,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:09:18,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:18,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810682025] [2021-05-02 14:09:18,703 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:18,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588768763] [2021-05-02 14:09:18,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588768763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:09:18,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:09:18,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:09:18,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66377779] [2021-05-02 14:09:18,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:09:18,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:18,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:09:18,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:09:18,705 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:09:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:18,730 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2021-05-02 14:09:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:09:18,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 14:09:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:18,746 INFO L225 Difference]: With dead ends: 113 [2021-05-02 14:09:18,747 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 14:09:18,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:09:18,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 14:09:18,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 14:09:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:09:18,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-05-02 14:09:18,766 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2021-05-02 14:09:18,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:18,766 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-05-02 14:09:18,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:09:18,766 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-05-02 14:09:18,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 14:09:18,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:18,767 INFO L523 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1] [2021-05-02 14:09:18,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:09:18,985 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:18,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:18,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1813008070, now seen corresponding path program 1 times [2021-05-02 14:09:18,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:18,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921659895] [2021-05-02 14:09:18,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:18,992 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:18,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329280848] [2021-05-02 14:09:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:09:19,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 14:09:19,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:19,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:09:19,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:19,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921659895] [2021-05-02 14:09:19,146 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:19,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329280848] [2021-05-02 14:09:19,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329280848] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:09:19,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:09:19,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 14:09:19,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034663515] [2021-05-02 14:09:19,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:09:19,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:19,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:09:19,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:09:19,147 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:09:19,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:19,208 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2021-05-02 14:09:19,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:09:19,208 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 14:09:19,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:19,209 INFO L225 Difference]: With dead ends: 84 [2021-05-02 14:09:19,209 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 14:09:19,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:09:19,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 14:09:19,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-02 14:09:19,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:09:19,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-05-02 14:09:19,215 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2021-05-02 14:09:19,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:19,215 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-05-02 14:09:19,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:09:19,216 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-05-02 14:09:19,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 14:09:19,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:19,217 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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 14:09:19,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:19,435 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:19,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:19,435 INFO L82 PathProgramCache]: Analyzing trace with hash -683043127, now seen corresponding path program 1 times [2021-05-02 14:09:19,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:19,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547710756] [2021-05-02 14:09:19,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:19,441 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:19,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926055732] [2021-05-02 14:09:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:09:19,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:09:19,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:19,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:09:19,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:19,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547710756] [2021-05-02 14:09:19,632 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:19,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926055732] [2021-05-02 14:09:19,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926055732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:09:19,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:09:19,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:09:19,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845883500] [2021-05-02 14:09:19,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:09:19,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:19,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:09:19,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:09:19,633 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:09:19,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:19,761 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2021-05-02 14:09:19,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:09:19,763 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-02 14:09:19,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:19,763 INFO L225 Difference]: With dead ends: 88 [2021-05-02 14:09:19,763 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 14:09:19,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:09:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 14:09:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-02 14:09:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:09:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-05-02 14:09:19,771 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2021-05-02 14:09:19,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:19,771 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-05-02 14:09:19,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:09:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-05-02 14:09:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 14:09:19,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:19,773 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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 14:09:19,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:19,973 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:19,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:19,974 INFO L82 PathProgramCache]: Analyzing trace with hash -589126939, now seen corresponding path program 1 times [2021-05-02 14:09:19,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:19,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091112687] [2021-05-02 14:09:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:19,980 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:19,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439900179] [2021-05-02 14:09:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:09:20,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:09:20,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:20,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:09:20,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:20,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091112687] [2021-05-02 14:09:20,142 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:20,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439900179] [2021-05-02 14:09:20,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439900179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:09:20,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:09:20,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:09:20,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545999505] [2021-05-02 14:09:20,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:09:20,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:20,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:09:20,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:09:20,144 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:09:20,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:20,189 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2021-05-02 14:09:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:09:20,189 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-05-02 14:09:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:20,190 INFO L225 Difference]: With dead ends: 115 [2021-05-02 14:09:20,190 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 14:09:20,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:09:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 14:09:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-05-02 14:09:20,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 14:09:20,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-05-02 14:09:20,198 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 50 [2021-05-02 14:09:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:20,198 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-05-02 14:09:20,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:09:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-05-02 14:09:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 14:09:20,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:20,199 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-02 14:09:20,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:09:20,405 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:20,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:20,406 INFO L82 PathProgramCache]: Analyzing trace with hash -484699953, now seen corresponding path program 1 times [2021-05-02 14:09:20,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:20,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972595965] [2021-05-02 14:09:20,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:20,413 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:20,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634036491] [2021-05-02 14:09:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:09:20,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 14:09:20,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:20,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 14:09:20,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:20,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972595965] [2021-05-02 14:09:20,689 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:20,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634036491] [2021-05-02 14:09:20,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634036491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:09:20,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:09:20,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:09:20,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773544388] [2021-05-02 14:09:20,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:09:20,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:20,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:09:20,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:09:20,690 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:09:20,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:20,842 INFO L93 Difference]: Finished difference Result 159 states and 194 transitions. [2021-05-02 14:09:20,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:09:20,843 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2021-05-02 14:09:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:20,845 INFO L225 Difference]: With dead ends: 159 [2021-05-02 14:09:20,845 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 14:09:20,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:09:20,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 14:09:20,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-02 14:09:20,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 14:09:20,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2021-05-02 14:09:20,863 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 55 [2021-05-02 14:09:20,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:20,864 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2021-05-02 14:09:20,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:09:20,864 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2021-05-02 14:09:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 14:09:20,866 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:20,866 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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 14:09:21,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:21,075 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:21,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:21,075 INFO L82 PathProgramCache]: Analyzing trace with hash 765609565, now seen corresponding path program 1 times [2021-05-02 14:09:21,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:21,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904007757] [2021-05-02 14:09:21,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:21,090 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:21,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760594742] [2021-05-02 14:09:21,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:09:21,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:09:21,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:21,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:09:21,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:21,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904007757] [2021-05-02 14:09:21,230 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:21,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760594742] [2021-05-02 14:09:21,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760594742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:09:21,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:09:21,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:09:21,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554199683] [2021-05-02 14:09:21,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:09:21,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:21,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:09:21,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:09:21,231 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:09:21,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:21,278 INFO L93 Difference]: Finished difference Result 149 states and 181 transitions. [2021-05-02 14:09:21,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:09:21,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 58 [2021-05-02 14:09:21,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:21,279 INFO L225 Difference]: With dead ends: 149 [2021-05-02 14:09:21,279 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 14:09:21,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:09:21,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 14:09:21,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-02 14:09:21,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 70 states have internal predecessors, (78), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 14:09:21,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-05-02 14:09:21,286 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 58 [2021-05-02 14:09:21,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:21,287 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-05-02 14:09:21,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:09:21,287 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-05-02 14:09:21,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 14:09:21,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:21,288 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 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, 1, 1, 1] [2021-05-02 14:09:21,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:21,504 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:21,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1361251212, now seen corresponding path program 1 times [2021-05-02 14:09:21,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:21,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278732519] [2021-05-02 14:09:21,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:21,514 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:21,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167108379] [2021-05-02 14:09:21,514 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 14:09:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:09:21,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:09:21,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:21,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 14:09:21,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:21,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278732519] [2021-05-02 14:09:21,698 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:21,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167108379] [2021-05-02 14:09:21,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167108379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:09:21,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:09:21,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:09:21,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608692592] [2021-05-02 14:09:21,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:09:21,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:21,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:09:21,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:09:21,700 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:09:21,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:21,754 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2021-05-02 14:09:21,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:09:21,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 74 [2021-05-02 14:09:21,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:21,755 INFO L225 Difference]: With dead ends: 135 [2021-05-02 14:09:21,755 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 14:09:21,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:09:21,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 14:09:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-05-02 14:09:21,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 84 states have internal predecessors, (92), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 14:09:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2021-05-02 14:09:21,763 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 74 [2021-05-02 14:09:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:21,763 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2021-05-02 14:09:21,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:09:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2021-05-02 14:09:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 14:09:21,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:21,764 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:09:21,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:09:21,981 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:21,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:21,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1777426592, now seen corresponding path program 1 times [2021-05-02 14:09:21,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:21,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059036537] [2021-05-02 14:09:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:21,989 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:21,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985124249] [2021-05-02 14:09:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:09:22,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 14:09:22,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:22,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-05-02 14:09:22,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:22,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059036537] [2021-05-02 14:09:22,525 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:22,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985124249] [2021-05-02 14:09:22,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985124249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:09:22,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:09:22,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:09:22,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473000658] [2021-05-02 14:09:22,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:09:22,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:22,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:09:22,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:09:22,528 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 14:09:22,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:22,804 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2021-05-02 14:09:22,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:09:22,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 79 [2021-05-02 14:09:22,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:22,806 INFO L225 Difference]: With dead ends: 158 [2021-05-02 14:09:22,806 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 14:09:22,806 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:09:22,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 14:09:22,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-05-02 14:09:22,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 98 states have internal predecessors, (110), 37 states have call successors, (37), 19 states have call predecessors, (37), 18 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 14:09:22,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 182 transitions. [2021-05-02 14:09:22,816 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 182 transitions. Word has length 79 [2021-05-02 14:09:22,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:22,816 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 182 transitions. [2021-05-02 14:09:22,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 14:09:22,816 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 182 transitions. [2021-05-02 14:09:22,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 14:09:22,817 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:22,817 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:09:23,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:09:23,035 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:23,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:23,036 INFO L82 PathProgramCache]: Analyzing trace with hash -554329876, now seen corresponding path program 2 times [2021-05-02 14:09:23,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:23,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913836170] [2021-05-02 14:09:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:23,047 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:23,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194450748] [2021-05-02 14:09:23,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:23,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:09:23,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:09:23,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:09:23,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:23,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 140 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 14:09:23,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:23,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913836170] [2021-05-02 14:09:23,221 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:23,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194450748] [2021-05-02 14:09:23,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194450748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:09:23,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:09:23,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:09:23,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121600799] [2021-05-02 14:09:23,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:09:23,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:23,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:09:23,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:09:23,222 INFO L87 Difference]: Start difference. First operand 151 states and 182 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:09:23,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:23,288 INFO L93 Difference]: Finished difference Result 197 states and 242 transitions. [2021-05-02 14:09:23,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:09:23,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 82 [2021-05-02 14:09:23,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:23,289 INFO L225 Difference]: With dead ends: 197 [2021-05-02 14:09:23,289 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 14:09:23,290 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:09:23,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 14:09:23,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-05-02 14:09:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.153061224489796) internal successors, (113), 100 states have internal predecessors, (113), 37 states have call successors, (37), 19 states have call predecessors, (37), 18 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 14:09:23,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2021-05-02 14:09:23,298 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 82 [2021-05-02 14:09:23,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:23,298 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2021-05-02 14:09:23,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:09:23,298 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2021-05-02 14:09:23,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 14:09:23,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:23,299 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:09:23,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:09:23,511 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:23,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:23,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1891783602, now seen corresponding path program 1 times [2021-05-02 14:09:23,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:23,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743774662] [2021-05-02 14:09:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:23,517 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:23,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551107608] [2021-05-02 14:09:23,517 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 14:09:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:09:23,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:09:23,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:23,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 27 proven. 191 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-02 14:09:23,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:23,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743774662] [2021-05-02 14:09:23,696 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:23,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551107608] [2021-05-02 14:09:23,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551107608] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:09:23,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:09:23,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:09:23,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271821162] [2021-05-02 14:09:23,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:09:23,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:23,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:09:23,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:09:23,697 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 14:09:23,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:23,796 INFO L93 Difference]: Finished difference Result 223 states and 269 transitions. [2021-05-02 14:09:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:09:23,797 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 90 [2021-05-02 14:09:23,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:23,798 INFO L225 Difference]: With dead ends: 223 [2021-05-02 14:09:23,798 INFO L226 Difference]: Without dead ends: 180 [2021-05-02 14:09:23,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:09:23,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-02 14:09:23,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2021-05-02 14:09:23,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 114 states have (on average 1.131578947368421) internal successors, (129), 116 states have internal predecessors, (129), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 14:09:23,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 209 transitions. [2021-05-02 14:09:23,815 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 209 transitions. Word has length 90 [2021-05-02 14:09:23,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:23,816 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 209 transitions. [2021-05-02 14:09:23,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 14:09:23,816 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 209 transitions. [2021-05-02 14:09:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 14:09:23,817 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:23,818 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 14:09:24,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:24,034 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:24,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:24,034 INFO L82 PathProgramCache]: Analyzing trace with hash -768653053, now seen corresponding path program 2 times [2021-05-02 14:09:24,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:24,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558843633] [2021-05-02 14:09:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:24,051 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:24,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810399688] [2021-05-02 14:09:24,052 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 14:09:24,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:09:24,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:09:24,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:09:24,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:24,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 26 proven. 270 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 14:09:24,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:24,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558843633] [2021-05-02 14:09:24,267 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:24,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810399688] [2021-05-02 14:09:24,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810399688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:09:24,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:09:24,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:09:24,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798777953] [2021-05-02 14:09:24,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:09:24,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:24,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:09:24,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:09:24,268 INFO L87 Difference]: Start difference. First operand 178 states and 209 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:09:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:24,354 INFO L93 Difference]: Finished difference Result 188 states and 219 transitions. [2021-05-02 14:09:24,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:09:24,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 98 [2021-05-02 14:09:24,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:24,356 INFO L225 Difference]: With dead ends: 188 [2021-05-02 14:09:24,356 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 14:09:24,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:09:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 14:09:24,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-05-02 14:09:24,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 119 states have internal predecessors, (132), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 14:09:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 212 transitions. [2021-05-02 14:09:24,365 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 212 transitions. Word has length 98 [2021-05-02 14:09:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:24,365 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 212 transitions. [2021-05-02 14:09:24,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:09:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 212 transitions. [2021-05-02 14:09:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 14:09:24,366 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:24,366 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:09:24,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:09:24,581 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:24,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:24,581 INFO L82 PathProgramCache]: Analyzing trace with hash -721908367, now seen corresponding path program 2 times [2021-05-02 14:09:24,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:24,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967571522] [2021-05-02 14:09:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:24,587 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:24,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803954510] [2021-05-02 14:09:24,587 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 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 14:09:24,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:09:24,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:09:24,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:09:24,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:24,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 51 proven. 40 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 14:09:24,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:24,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967571522] [2021-05-02 14:09:24,941 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:24,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803954510] [2021-05-02 14:09:24,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803954510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:09:24,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:09:24,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:09:24,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488376471] [2021-05-02 14:09:24,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:09:24,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:24,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:09:24,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:09:24,945 INFO L87 Difference]: Start difference. First operand 181 states and 212 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 14:09:25,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:25,284 INFO L93 Difference]: Finished difference Result 216 states and 258 transitions. [2021-05-02 14:09:25,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:09:25,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 103 [2021-05-02 14:09:25,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:25,285 INFO L225 Difference]: With dead ends: 216 [2021-05-02 14:09:25,285 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 14:09:25,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:09:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 14:09:25,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2021-05-02 14:09:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 134 states have (on average 1.1417910447761195) internal successors, (153), 136 states have internal predecessors, (153), 50 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 14:09:25,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 251 transitions. [2021-05-02 14:09:25,296 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 251 transitions. Word has length 103 [2021-05-02 14:09:25,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:25,297 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 251 transitions. [2021-05-02 14:09:25,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 14:09:25,297 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 251 transitions. [2021-05-02 14:09:25,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 14:09:25,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:25,298 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:09:25,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:09:25,509 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:25,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:25,509 INFO L82 PathProgramCache]: Analyzing trace with hash 447330249, now seen corresponding path program 3 times [2021-05-02 14:09:25,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:25,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854573475] [2021-05-02 14:09:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:25,514 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:25,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523311360] [2021-05-02 14:09:25,514 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 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 14:09:25,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 14:09:25,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:09:25,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 14:09:25,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:25,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 86 proven. 36 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-05-02 14:09:25,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:25,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854573475] [2021-05-02 14:09:25,850 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:25,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523311360] [2021-05-02 14:09:25,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523311360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:09:25,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:09:25,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:09:25,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978769205] [2021-05-02 14:09:25,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:09:25,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:25,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:09:25,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:09:25,852 INFO L87 Difference]: Start difference. First operand 210 states and 251 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:09:32,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:32,238 INFO L93 Difference]: Finished difference Result 295 states and 356 transitions. [2021-05-02 14:09:32,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:09:32,238 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 106 [2021-05-02 14:09:32,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:32,239 INFO L225 Difference]: With dead ends: 295 [2021-05-02 14:09:32,239 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 14:09:32,240 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:09:32,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 14:09:32,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 235. [2021-05-02 14:09:32,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.105263157894737) internal successors, (168), 155 states have internal predecessors, (168), 52 states have call successors, (52), 31 states have call predecessors, (52), 30 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 14:09:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 270 transitions. [2021-05-02 14:09:32,253 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 270 transitions. Word has length 106 [2021-05-02 14:09:32,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:32,253 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 270 transitions. [2021-05-02 14:09:32,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:09:32,253 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 270 transitions. [2021-05-02 14:09:32,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 14:09:32,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:32,254 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:09:32,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 14:09:32,465 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:32,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:32,465 INFO L82 PathProgramCache]: Analyzing trace with hash 436746049, now seen corresponding path program 2 times [2021-05-02 14:09:32,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:32,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766604192] [2021-05-02 14:09:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:32,470 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:32,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505360206] [2021-05-02 14:09:32,470 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:32,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:09:32,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:09:32,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 14:09:32,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:32,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 102 proven. 18 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-05-02 14:09:32,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:32,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766604192] [2021-05-02 14:09:32,777 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:32,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505360206] [2021-05-02 14:09:32,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505360206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:09:32,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:09:32,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:09:32,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105239532] [2021-05-02 14:09:32,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:09:32,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:32,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:09:32,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:09:32,779 INFO L87 Difference]: Start difference. First operand 235 states and 270 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 14:09:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:32,898 INFO L93 Difference]: Finished difference Result 346 states and 416 transitions. [2021-05-02 14:09:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:09:32,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 114 [2021-05-02 14:09:32,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:32,901 INFO L225 Difference]: With dead ends: 346 [2021-05-02 14:09:32,901 INFO L226 Difference]: Without dead ends: 247 [2021-05-02 14:09:32,901 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:09:32,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-02 14:09:32,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 227. [2021-05-02 14:09:32,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 146 states have (on average 1.13013698630137) internal successors, (165), 150 states have internal predecessors, (165), 54 states have call successors, (54), 27 states have call predecessors, (54), 26 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 14:09:32,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 271 transitions. [2021-05-02 14:09:32,913 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 271 transitions. Word has length 114 [2021-05-02 14:09:32,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:32,913 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 271 transitions. [2021-05-02 14:09:32,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 14:09:32,913 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 271 transitions. [2021-05-02 14:09:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 14:09:32,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:32,914 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:09:33,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:33,121 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:33,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:33,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2077207105, now seen corresponding path program 3 times [2021-05-02 14:09:33,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:33,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543826037] [2021-05-02 14:09:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:33,127 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:33,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112478690] [2021-05-02 14:09:33,127 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:33,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:09:33,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:09:33,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 14:09:33,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:33,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:33,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:33,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:33,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 106 proven. 18 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-05-02 14:09:33,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:33,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543826037] [2021-05-02 14:09:33,346 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:33,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112478690] [2021-05-02 14:09:33,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112478690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:09:33,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:09:33,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:09:33,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702305264] [2021-05-02 14:09:33,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:09:33,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:33,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:09:33,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:09:33,347 INFO L87 Difference]: Start difference. First operand 227 states and 271 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:09:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:35,582 INFO L93 Difference]: Finished difference Result 238 states and 283 transitions. [2021-05-02 14:09:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:09:35,583 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 114 [2021-05-02 14:09:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:35,584 INFO L225 Difference]: With dead ends: 238 [2021-05-02 14:09:35,584 INFO L226 Difference]: Without dead ends: 227 [2021-05-02 14:09:35,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:09:35,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-02 14:09:35,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2021-05-02 14:09:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 143 states have (on average 1.118881118881119) internal successors, (160), 147 states have internal predecessors, (160), 54 states have call successors, (54), 28 states have call predecessors, (54), 27 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 14:09:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 265 transitions. [2021-05-02 14:09:35,594 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 265 transitions. Word has length 114 [2021-05-02 14:09:35,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:35,594 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 265 transitions. [2021-05-02 14:09:35,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:09:35,594 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 265 transitions. [2021-05-02 14:09:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 14:09:35,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:35,595 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:09:35,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:35,813 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:35,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:35,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1338024082, now seen corresponding path program 4 times [2021-05-02 14:09:35,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:35,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532032845] [2021-05-02 14:09:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:35,818 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:35,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285446649] [2021-05-02 14:09:35,819 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:35,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:09:35,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:09:35,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 14:09:35,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:35,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 45 proven. 81 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 14:09:36,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:36,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532032845] [2021-05-02 14:09:36,247 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:36,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285446649] [2021-05-02 14:09:36,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285446649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:09:36,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:09:36,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:09:36,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192102195] [2021-05-02 14:09:36,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:09:36,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:36,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:09:36,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:09:36,248 INFO L87 Difference]: Start difference. First operand 225 states and 265 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 14:09:36,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:36,725 INFO L93 Difference]: Finished difference Result 289 states and 347 transitions. [2021-05-02 14:09:36,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:09:36,726 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 122 [2021-05-02 14:09:36,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:36,727 INFO L225 Difference]: With dead ends: 289 [2021-05-02 14:09:36,727 INFO L226 Difference]: Without dead ends: 282 [2021-05-02 14:09:36,727 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:09:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-02 14:09:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 277. [2021-05-02 14:09:36,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 174 states have (on average 1.132183908045977) internal successors, (197), 178 states have internal predecessors, (197), 70 states have call successors, (70), 33 states have call predecessors, (70), 32 states have return successors, (67), 65 states have call predecessors, (67), 67 states have call successors, (67) [2021-05-02 14:09:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 334 transitions. [2021-05-02 14:09:36,738 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 334 transitions. Word has length 122 [2021-05-02 14:09:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:36,739 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 334 transitions. [2021-05-02 14:09:36,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 14:09:36,739 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 334 transitions. [2021-05-02 14:09:36,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 14:09:36,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:36,740 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-05-02 14:09:36,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 14:09:36,953 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:36,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:36,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1198671626, now seen corresponding path program 3 times [2021-05-02 14:09:36,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:36,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381979599] [2021-05-02 14:09:36,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:36,963 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:36,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845673188] [2021-05-02 14:09:36,963 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:37,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 14:09:37,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:09:37,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:09:37,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:39,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:39,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 100 proven. 12 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2021-05-02 14:09:39,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:39,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381979599] [2021-05-02 14:09:39,268 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:39,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845673188] [2021-05-02 14:09:39,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845673188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:09:39,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:09:39,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:09:39,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787957186] [2021-05-02 14:09:39,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:09:39,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:39,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:09:39,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2021-05-02 14:09:39,269 INFO L87 Difference]: Start difference. First operand 277 states and 334 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 14:09:45,301 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 14:10:13,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:10:13,731 INFO L93 Difference]: Finished difference Result 311 states and 383 transitions. [2021-05-02 14:10:13,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:10:13,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2021-05-02 14:10:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:10:13,735 INFO L225 Difference]: With dead ends: 311 [2021-05-02 14:10:13,735 INFO L226 Difference]: Without dead ends: 304 [2021-05-02 14:10:13,735 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8132.2ms TimeCoverageRelationStatistics Valid=40, Invalid=114, Unknown=2, NotChecked=0, Total=156 [2021-05-02 14:10:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-02 14:10:13,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 234. [2021-05-02 14:10:13,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 149 states have (on average 1.1073825503355705) internal successors, (165), 154 states have internal predecessors, (165), 55 states have call successors, (55), 30 states have call predecessors, (55), 29 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 14:10:13,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2021-05-02 14:10:13,747 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 130 [2021-05-02 14:10:13,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:10:13,748 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2021-05-02 14:10:13,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 14:10:13,748 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2021-05-02 14:10:13,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 14:10:13,750 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:10:13,750 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-05-02 14:10:13,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 14:10:13,966 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:10:13,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:10:13,966 INFO L82 PathProgramCache]: Analyzing trace with hash 518951120, now seen corresponding path program 4 times [2021-05-02 14:10:13,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:10:13,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134744835] [2021-05-02 14:10:13,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:10:13,972 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:10:13,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903394001] [2021-05-02 14:10:13,972 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:10:14,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:10:14,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:10:14,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 14:10:14,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:10:14,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 49 proven. 103 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-05-02 14:10:14,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:10:14,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134744835] [2021-05-02 14:10:14,567 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:10:14,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903394001] [2021-05-02 14:10:14,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903394001] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:10:14,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:10:14,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 14:10:14,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062599839] [2021-05-02 14:10:14,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 14:10:14,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:10:14,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 14:10:14,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:10:14,568 INFO L87 Difference]: Start difference. First operand 234 states and 272 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 14:10:15,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:10:15,207 INFO L93 Difference]: Finished difference Result 377 states and 444 transitions. [2021-05-02 14:10:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:10:15,208 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) Word has length 138 [2021-05-02 14:10:15,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:10:15,209 INFO L225 Difference]: With dead ends: 377 [2021-05-02 14:10:15,209 INFO L226 Difference]: Without dead ends: 274 [2021-05-02 14:10:15,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-02 14:10:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-02 14:10:15,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2021-05-02 14:10:15,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 174 states have (on average 1.0977011494252873) internal successors, (191), 179 states have internal predecessors, (191), 61 states have call successors, (61), 35 states have call predecessors, (61), 34 states have return successors, (58), 55 states have call predecessors, (58), 58 states have call successors, (58) [2021-05-02 14:10:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 310 transitions. [2021-05-02 14:10:15,223 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 310 transitions. Word has length 138 [2021-05-02 14:10:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:10:15,223 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 310 transitions. [2021-05-02 14:10:15,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 14:10:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 310 transitions. [2021-05-02 14:10:15,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 14:10:15,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:10:15,224 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:10:15,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:10:15,429 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:10:15,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:10:15,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1738824718, now seen corresponding path program 5 times [2021-05-02 14:10:15,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:10:15,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151214052] [2021-05-02 14:10:15,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:10:15,434 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:10:15,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496839037] [2021-05-02 14:10:15,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:10:15,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-02 14:10:15,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:10:15,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 14:10:15,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:10:15,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:15,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:15,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:15,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:15,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:15,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:15,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 481 proven. 1 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-05-02 14:10:15,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:10:15,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151214052] [2021-05-02 14:10:15,717 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:10:15,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496839037] [2021-05-02 14:10:15,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496839037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:10:15,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:10:15,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:10:15,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357763209] [2021-05-02 14:10:15,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:10:15,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:10:15,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:10:15,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:10:15,719 INFO L87 Difference]: Start difference. First operand 270 states and 310 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 14:10:15,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:10:15,770 INFO L93 Difference]: Finished difference Result 373 states and 431 transitions. [2021-05-02 14:10:15,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:10:15,771 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 154 [2021-05-02 14:10:15,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:10:15,772 INFO L225 Difference]: With dead ends: 373 [2021-05-02 14:10:15,772 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 14:10:15,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:10:15,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 14:10:15,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2021-05-02 14:10:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 124 states have (on average 1.0725806451612903) internal successors, (133), 129 states have internal predecessors, (133), 43 states have call successors, (43), 27 states have call predecessors, (43), 25 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 14:10:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 214 transitions. [2021-05-02 14:10:15,783 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 214 transitions. Word has length 154 [2021-05-02 14:10:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:10:15,783 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 214 transitions. [2021-05-02 14:10:15,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 14:10:15,783 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 214 transitions. [2021-05-02 14:10:15,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 14:10:15,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:10:15,784 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2021-05-02 14:10:15,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 14:10:15,997 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:10:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:10:15,997 INFO L82 PathProgramCache]: Analyzing trace with hash -208343713, now seen corresponding path program 6 times [2021-05-02 14:10:15,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:10:15,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835546548] [2021-05-02 14:10:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:10:16,007 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:10:16,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844364816] [2021-05-02 14:10:16,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:10:16,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-05-02 14:10:16,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:10:16,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:10:16,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:10:16,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 987 proven. 1 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 14:10:16,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:10:16,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835546548] [2021-05-02 14:10:16,359 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:10:16,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844364816] [2021-05-02 14:10:16,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844364816] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:10:16,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:10:16,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:10:16,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186497161] [2021-05-02 14:10:16,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:10:16,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:10:16,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:10:16,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:10:16,360 INFO L87 Difference]: Start difference. First operand 193 states and 214 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 7 states have call predecessors, (25), 8 states have call successors, (25) [2021-05-02 14:10:16,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:10:16,462 INFO L93 Difference]: Finished difference Result 201 states and 220 transitions. [2021-05-02 14:10:16,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:10:16,463 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 7 states have call predecessors, (25), 8 states have call successors, (25) Word has length 162 [2021-05-02 14:10:16,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:10:16,463 INFO L225 Difference]: With dead ends: 201 [2021-05-02 14:10:16,463 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:10:16,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:10:16,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:10:16,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:10:16,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 14:10:16,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:10:16,464 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 162 [2021-05-02 14:10:16,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:10:16,464 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:10:16,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 7 states have call predecessors, (25), 8 states have call successors, (25) [2021-05-02 14:10:16,464 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:10:16,465 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:10:16,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:10:16,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:10:25,391 WARN L205 SmtUtils]: Spent 8.45 s on a formula simplification. DAG size of input: 116 DAG size of output: 81 [2021-05-02 14:10:39,762 WARN L205 SmtUtils]: Spent 14.37 s on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2021-05-02 14:10:58,283 WARN L205 SmtUtils]: Spent 18.52 s on a formula simplification. DAG size of input: 87 DAG size of output: 37 [2021-05-02 14:11:20,894 WARN L205 SmtUtils]: Spent 22.59 s on a formula simplification. DAG size of input: 118 DAG size of output: 82 [2021-05-02 14:11:35,390 WARN L205 SmtUtils]: Spent 14.50 s on a formula simplification. DAG size of input: 96 DAG size of output: 71 [2021-05-02 14:11:49,919 WARN L205 SmtUtils]: Spent 14.53 s on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2021-05-02 14:11:50,143 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 57 [2021-05-02 14:12:04,656 WARN L205 SmtUtils]: Spent 14.51 s on a formula simplification. DAG size of input: 96 DAG size of output: 71 [2021-05-02 14:12:30,120 WARN L205 SmtUtils]: Spent 25.44 s on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2021-05-02 14:12:30,177 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 14:12:30,180 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 14:12:30,180 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 14:12:30,180 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:12:30,181 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 14:12:30,181 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:12:30,181 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:12:30,181 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (<= ~counter~0 0) (<= 0 ~counter~0)) [2021-05-02 14:12:30,181 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 14:12:30,181 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:12:30,181 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-02 14:12:30,181 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 14:12:30,181 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 14:12:30,181 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 14:12:30,181 INFO L194 CegarLoopUtils]: At program point L37-4(lines 37 61) the Hoare annotation is: (let ((.cse0 (<= 1 main_~y~0)) (.cse1 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (and (= main_~x~0 (+ (* (* (div (* main_~q~0 (- 1)) (- 2)) main_~y~0) 2) main_~r~0)) (= (mod main_~q~0 (- 2)) 0) .cse0 .cse1) (not (<= |old(~counter~0)| 0)) (and (= main_~q~0 0) (= main_~x~0 main_~r~0) .cse0) (not (<= 0 |old(~counter~0)|)) (and (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) .cse0 .cse1))) [2021-05-02 14:12:30,181 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 23 65) no Hoare annotation was computed. [2021-05-02 14:12:30,181 INFO L194 CegarLoopUtils]: At program point L54(line 54) the Hoare annotation is: (let ((.cse6 (* main_~y~0 main_~a~0))) (let ((.cse0 (= main_~b~0 main_~y~0)) (.cse3 (= main_~q~0 0)) (.cse4 (= main_~x~0 main_~r~0)) (.cse1 (<= (* 2 .cse6) main_~r~0)) (.cse5 (<= 1 main_~y~0)) (.cse2 (= main_~b~0 .cse6))) (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) .cse0 .cse1 (= (mod main_~q~0 (- 2)) 0) .cse2 (< (* 2 main_~r~0) main_~x~0) (< main_~x~0 (* 8 main_~y~0))) (and (<= 4 ~counter~0) .cse3 .cse4 .cse1 .cse5 .cse2 (= main_~a~0 4)) (and .cse3 .cse4 (= (mod main_~a~0 (- 2)) 0) .cse1 (= (* (* (div (* main_~a~0 (- 1)) (- 2)) main_~y~0) 2) main_~b~0) .cse5 .cse2 (<= 1 main_~r~0) (<= 5 ~counter~0)) (and .cse3 .cse0 .cse4 .cse1 .cse5 .cse2 (<= ~counter~0 2) (<= 2 ~counter~0)) (not (<= 0 |old(~counter~0)|)) (and .cse3 .cse4 .cse1 (<= 3 ~counter~0) .cse5 (<= ~counter~0 3) .cse2 (= main_~a~0 2))))) [2021-05-02 14:12:30,181 INFO L198 CegarLoopUtils]: For program point L54-1(line 54) no Hoare annotation was computed. [2021-05-02 14:12:30,182 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (let ((.cse7 (= (mod main_~q~0 (- 2)) 0)) (.cse9 (< (* 2 main_~r~0) main_~x~0)) (.cse10 (< main_~x~0 (* 8 main_~y~0))) (.cse4 (= main_~a~0 2)) (.cse5 (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0)) (.cse0 (= main_~q~0 0)) (.cse6 (= main_~b~0 main_~y~0)) (.cse1 (= main_~x~0 main_~r~0)) (.cse8 (<= main_~y~0 main_~r~0)) (.cse2 (<= 1 main_~y~0)) (.cse3 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (not (<= |old(~counter~0)| 0)) (and .cse0 .cse1 (<= 3 ~counter~0) .cse2 (<= ~counter~0 3) .cse3 .cse4 (<= (* 2 (div main_~b~0 2)) main_~r~0)) (and .cse0 .cse1 (= (mod main_~a~0 (- 2)) 0) (= (* (* (div (* main_~a~0 (- 1)) (- 2)) main_~y~0) 2) main_~b~0) .cse2 .cse3 (<= 1 main_~r~0) (<= 5 ~counter~0)) (and .cse5 .cse6 .cse7 .cse8 .cse9 .cse3 .cse10) (and (<= (* 2 main_~y~0) main_~r~0) .cse5 .cse7 .cse9 .cse3 .cse10 .cse4) (and .cse5 .cse8 .cse3 (< main_~r~0 (* 2 main_~b~0)) (<= main_~b~0 main_~y~0)) (and (<= 4 ~counter~0) (<= (* 4 main_~y~0) main_~r~0) .cse0 .cse1 .cse2 .cse3 (= main_~a~0 4)) (not (<= 0 |old(~counter~0)|)) (and .cse0 .cse6 .cse1 .cse8 .cse2 .cse3 (<= ~counter~0 2) (<= 2 ~counter~0)))) [2021-05-02 14:12:30,182 INFO L198 CegarLoopUtils]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2021-05-02 14:12:30,182 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 23 65) no Hoare annotation was computed. [2021-05-02 14:12:30,182 INFO L194 CegarLoopUtils]: At program point L46-3(lines 46 58) the Hoare annotation is: (let ((.cse12 (* 8 main_~y~0))) (let ((.cse1 (= main_~b~0 main_~y~0)) (.cse8 (= (mod main_~q~0 (- 2)) 0)) (.cse9 (< (* 2 main_~r~0) main_~x~0)) (.cse10 (< main_~x~0 .cse12)) (.cse7 (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0)) (.cse3 (<= main_~y~0 main_~r~0)) (.cse11 (= main_~a~0 2)) (.cse0 (= main_~q~0 0)) (.cse2 (= main_~x~0 main_~r~0)) (.cse4 (<= 1 main_~y~0)) (.cse5 (= main_~b~0 (* main_~y~0 main_~a~0))) (.cse6 (<= 1 main_~r~0))) (or (not (<= |old(~counter~0)| 0)) (and (<= 1 ~counter~0) (<= ~counter~0 1) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5) (and .cse0 .cse2 (= (mod main_~a~0 (- 2)) 0) (= (* (* (div (* main_~a~0 (- 1)) (- 2)) main_~y~0) 2) main_~b~0) .cse4 .cse5 .cse6 (<= 5 ~counter~0)) (and .cse7 .cse1 .cse8 .cse3 .cse9 .cse5 .cse10) (and (<= (* 4 main_~y~0) main_~r~0) .cse0 .cse2 (<= 3 ~counter~0) .cse4 (<= ~counter~0 3) .cse5 (= main_~a~0 4) .cse6) (and (<= (* 2 main_~y~0) main_~r~0) .cse7 .cse8 .cse9 .cse5 .cse10 .cse11) (and .cse7 .cse3 .cse5 (< main_~r~0 (* 2 main_~b~0)) (<= main_~b~0 main_~y~0)) (and .cse7 (<= 7 ~counter~0) (= main_~a~0 1) .cse4 .cse3 .cse5) (not (<= 0 |old(~counter~0)|)) (and .cse0 .cse2 .cse4 .cse5 (<= ~counter~0 2) (<= 2 ~counter~0) .cse11 (<= (* 2 (div main_~b~0 2)) main_~r~0)) (and (<= 4 ~counter~0) .cse0 .cse2 (<= .cse12 main_~r~0) .cse4 .cse5 .cse6 (= main_~a~0 8))))) [2021-05-02 14:12:30,182 INFO L198 CegarLoopUtils]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2021-05-02 14:12:30,182 INFO L194 CegarLoopUtils]: At program point L38(line 38) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0)) (.cse2 (= main_~a~0 1)) (.cse6 (* main_~r~0 (- 1))) (.cse7 (<= (div (* main_~b~0 (- 1)) (- 2)) main_~y~0)) (.cse9 (= main_~q~0 6)) (.cse10 (<= (* 6 main_~y~0) main_~x~0)) (.cse11 (= (+ (* main_~y~0 6) main_~r~0) main_~x~0)) (.cse1 (<= 7 ~counter~0)) (.cse3 (<= 1 main_~y~0)) (.cse5 (= main_~a~0 main_~q~0)) (.cse4 (= main_~b~0 (* main_~y~0 main_~a~0))) (.cse12 (< main_~x~0 (* 8 main_~y~0))) (.cse8 (= main_~x~0 (+ main_~r~0 main_~b~0)))) (or (not (<= |old(~counter~0)| 0)) (and .cse0 .cse1 .cse2 .cse3 .cse4) (and (<= ~counter~0 4) (= (+ main_~b~0 main_~r~0) main_~x~0) .cse5 (<= (* 2 (div (+ main_~x~0 .cse6) 2)) main_~x~0) .cse7 (< (* 2 main_~r~0) main_~x~0) .cse4) (and (<= 1 ~counter~0) (<= ~counter~0 1) .cse5 .cse3 .cse4 (= main_~a~0 0) .cse8) (and .cse0 .cse2 .cse3 (< (div (+ .cse6 (- 1)) (- 2)) (+ main_~y~0 1)) .cse4) (and .cse9 .cse10 .cse11 .cse7 .cse4 .cse12) (and .cse9 .cse10 .cse1 .cse11 .cse4 .cse12) (and (= main_~x~0 (+ (* (* (div (* main_~q~0 (- 1)) (- 2)) main_~y~0) 2) main_~r~0)) .cse1 (= (mod main_~q~0 (- 2)) 0) .cse5 .cse3 .cse4 .cse8) (not (<= 0 |old(~counter~0)|)) (and (= main_~q~0 4) (<= (* 4 main_~y~0) main_~x~0) .cse5 .cse4 .cse12 .cse8))) [2021-05-02 14:12:30,182 INFO L194 CegarLoopUtils]: At program point L38-1(line 38) the Hoare annotation is: (let ((.cse3 (* main_~y~0 main_~q~0))) (let ((.cse0 (= (+ .cse3 main_~r~0) main_~x~0)) (.cse1 (<= 1 main_~y~0)) (.cse4 (= main_~a~0 main_~q~0)) (.cse2 (= main_~b~0 (* main_~y~0 main_~a~0))) (.cse5 (= main_~x~0 (+ main_~r~0 main_~b~0)))) (or (not (<= |old(~counter~0)| 0)) (and .cse0 (<= 7 ~counter~0) .cse1 .cse2) (and (< (+ .cse3 (* 2 main_~r~0)) (+ main_~x~0 main_~y~0)) .cse0 (<= .cse3 main_~x~0) .cse2) (and (<= 1 ~counter~0) (<= ~counter~0 1) (= main_~x~0 main_~r~0) .cse4 .cse1 .cse2 .cse5) (and .cse0 .cse1 (< (div (+ (* main_~r~0 (- 1)) (- 1)) (- 2)) (+ main_~y~0 1)) (<= (div (* main_~b~0 (- 1)) (- 2)) main_~y~0) .cse2) (not (<= 0 |old(~counter~0)|)) (and (= main_~q~0 4) (<= (* 4 main_~y~0) main_~x~0) .cse4 .cse2 (< main_~x~0 (* 8 main_~y~0)) .cse5)))) [2021-05-02 14:12:30,182 INFO L198 CegarLoopUtils]: For program point L63(line 63) no Hoare annotation was computed. [2021-05-02 14:12:30,183 INFO L194 CegarLoopUtils]: At program point L30(line 30) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 14:12:30,183 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 23 65) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 14:12:30,183 INFO L198 CegarLoopUtils]: For program point L30-1(line 30) no Hoare annotation was computed. [2021-05-02 14:12:30,183 INFO L198 CegarLoopUtils]: For program point L49(lines 46 58) no Hoare annotation was computed. [2021-05-02 14:12:30,183 INFO L194 CegarLoopUtils]: At program point L47(line 47) the Hoare annotation is: (let ((.cse7 (= (mod main_~q~0 (- 2)) 0)) (.cse9 (< (* 2 main_~r~0) main_~x~0)) (.cse10 (< main_~x~0 (* 8 main_~y~0))) (.cse4 (= main_~a~0 2)) (.cse5 (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0)) (.cse0 (= main_~q~0 0)) (.cse6 (= main_~b~0 main_~y~0)) (.cse1 (= main_~x~0 main_~r~0)) (.cse8 (<= main_~y~0 main_~r~0)) (.cse2 (<= 1 main_~y~0)) (.cse3 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (not (<= |old(~counter~0)| 0)) (and .cse0 .cse1 (<= 3 ~counter~0) .cse2 (<= ~counter~0 3) .cse3 .cse4 (<= (* 2 (div main_~b~0 2)) main_~r~0)) (and .cse0 .cse1 (= (mod main_~a~0 (- 2)) 0) (= (* (* (div (* main_~a~0 (- 1)) (- 2)) main_~y~0) 2) main_~b~0) .cse2 .cse3 (<= 1 main_~r~0) (<= 5 ~counter~0)) (and .cse5 .cse6 .cse7 .cse8 .cse9 .cse3 .cse10) (and (<= (* 2 main_~y~0) main_~r~0) .cse5 .cse7 .cse9 .cse3 .cse10 .cse4) (and .cse5 .cse8 .cse3 (< main_~r~0 (* 2 main_~b~0)) (<= main_~b~0 main_~y~0)) (and (<= 4 ~counter~0) (<= (* 4 main_~y~0) main_~r~0) .cse0 .cse1 .cse2 .cse3 (= main_~a~0 4)) (not (<= 0 |old(~counter~0)|)) (and .cse0 .cse6 .cse1 .cse8 .cse2 .cse3 (<= ~counter~0 2) (<= 2 ~counter~0)))) [2021-05-02 14:12:30,183 INFO L194 CegarLoopUtils]: At program point L47-1(line 47) the Hoare annotation is: (let ((.cse7 (= (mod main_~q~0 (- 2)) 0)) (.cse9 (< (* 2 main_~r~0) main_~x~0)) (.cse10 (< main_~x~0 (* 8 main_~y~0))) (.cse4 (= main_~a~0 2)) (.cse5 (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0)) (.cse0 (= main_~q~0 0)) (.cse6 (= main_~b~0 main_~y~0)) (.cse1 (= main_~x~0 main_~r~0)) (.cse8 (<= main_~y~0 main_~r~0)) (.cse2 (<= 1 main_~y~0)) (.cse3 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (not (<= |old(~counter~0)| 0)) (and .cse0 .cse1 (<= 3 ~counter~0) .cse2 (<= ~counter~0 3) .cse3 .cse4 (<= (* 2 (div main_~b~0 2)) main_~r~0)) (and .cse0 .cse1 (= (mod main_~a~0 (- 2)) 0) (= (* (* (div (* main_~a~0 (- 1)) (- 2)) main_~y~0) 2) main_~b~0) .cse2 .cse3 (<= 1 main_~r~0) (<= 5 ~counter~0)) (and .cse5 .cse6 .cse7 .cse8 .cse9 .cse3 .cse10) (and (<= (* 2 main_~y~0) main_~r~0) .cse5 .cse7 .cse9 .cse3 .cse10 .cse4) (and .cse5 .cse8 .cse3 (< main_~r~0 (* 2 main_~b~0)) (<= main_~b~0 main_~y~0)) (and (<= 4 ~counter~0) (<= (* 4 main_~y~0) main_~r~0) .cse0 .cse1 .cse2 .cse3 (= main_~a~0 4)) (not (<= 0 |old(~counter~0)|)) (and .cse0 .cse6 .cse1 .cse8 .cse2 .cse3 (<= ~counter~0 2) (<= 2 ~counter~0)))) [2021-05-02 14:12:30,183 INFO L198 CegarLoopUtils]: For program point L39(lines 37 61) no Hoare annotation was computed. [2021-05-02 14:12:30,183 INFO L198 CegarLoopUtils]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2021-05-02 14:12:30,183 INFO L194 CegarLoopUtils]: At program point L37-3(lines 37 61) the Hoare annotation is: (let ((.cse6 (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0)) (.cse2 (<= 6 ~counter~0)) (.cse7 (= main_~a~0 1)) (.cse9 (* main_~r~0 (- 1))) (.cse0 (= main_~q~0 6)) (.cse1 (<= (* 6 main_~y~0) main_~x~0)) (.cse3 (= (+ (* main_~y~0 6) main_~r~0) main_~x~0)) (.cse11 (<= (div (* main_~b~0 (- 1)) (- 2)) main_~y~0)) (.cse5 (< main_~x~0 (* 8 main_~y~0))) (.cse10 (= main_~a~0 main_~q~0)) (.cse8 (<= 1 main_~y~0)) (.cse4 (= main_~b~0 (* main_~y~0 main_~a~0))) (.cse12 (= main_~x~0 (+ main_~r~0 main_~b~0)))) (or (not (<= |old(~counter~0)| 0)) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5) (and .cse6 .cse7 .cse8 (< (div (+ .cse9 (- 1)) (- 2)) (+ main_~y~0 1)) .cse4) (and .cse6 .cse2 .cse7 .cse8 .cse4) (and (= (+ main_~b~0 main_~r~0) main_~x~0) .cse10 (<= (* 2 (div (+ main_~x~0 .cse9) 2)) main_~x~0) .cse11 (< (* 2 main_~r~0) main_~x~0) .cse4 (<= ~counter~0 3)) (not (<= 0 |old(~counter~0)|)) (and (= main_~q~0 4) (<= (* 4 main_~y~0) main_~x~0) .cse10 .cse4 .cse5 .cse12) (and (<= ~counter~0 0) .cse10 .cse8 .cse4 (= main_~a~0 0) (<= 0 ~counter~0) .cse12) (and .cse0 .cse1 .cse3 .cse4 .cse11 .cse5) (and (= main_~x~0 (+ (* (* (div (* main_~q~0 (- 1)) (- 2)) main_~y~0) 2) main_~r~0)) (= (mod main_~q~0 (- 2)) 0) .cse10 .cse8 .cse4 .cse12 (<= 5 ~counter~0)))) [2021-05-02 14:12:30,183 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 14:12:30,183 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 14:12:30,183 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 14:12:30,184 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 14:12:30,184 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 14:12:30,184 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 14:12:30,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:12:30 BoogieIcfgContainer [2021-05-02 14:12:30,198 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:12:30,199 INFO L168 Benchmark]: Toolchain (without parser) took 194552.63 ms. Allocated memory was 186.6 MB in the beginning and 330.3 MB in the end (delta: 143.7 MB). Free memory was 150.6 MB in the beginning and 199.4 MB in the end (delta: -48.8 MB). Peak memory consumption was 181.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:12:30,199 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 186.6 MB. Free memory is still 167.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:12:30,199 INFO L168 Benchmark]: CACSL2BoogieTranslator took 210.87 ms. Allocated memory is still 186.6 MB. Free memory was 150.4 MB in the beginning and 169.1 MB in the end (delta: -18.8 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:12:30,199 INFO L168 Benchmark]: Boogie Preprocessor took 33.82 ms. Allocated memory is still 186.6 MB. Free memory was 169.1 MB in the beginning and 167.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:12:30,199 INFO L168 Benchmark]: RCFGBuilder took 273.66 ms. Allocated memory is still 186.6 MB. Free memory was 167.6 MB in the beginning and 150.8 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:12:30,199 INFO L168 Benchmark]: TraceAbstraction took 194027.48 ms. Allocated memory was 186.6 MB in the beginning and 330.3 MB in the end (delta: 143.7 MB). Free memory was 150.8 MB in the beginning and 199.4 MB in the end (delta: -48.6 MB). Peak memory consumption was 181.3 MB. Max. memory is 8.0 GB. [2021-05-02 14:12:30,200 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 186.6 MB. Free memory is still 167.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 210.87 ms. Allocated memory is still 186.6 MB. Free memory was 150.4 MB in the beginning and 169.1 MB in the end (delta: -18.8 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.82 ms. Allocated memory is still 186.6 MB. Free memory was 169.1 MB in the beginning and 167.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 273.66 ms. Allocated memory is still 186.6 MB. Free memory was 167.6 MB in the beginning and 150.8 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 194027.48 ms. Allocated memory was 186.6 MB in the beginning and 330.3 MB in the end (delta: 143.7 MB). Free memory was 150.8 MB in the beginning and 199.4 MB in the end (delta: -48.6 MB). Peak memory consumption was 181.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 60453.6ms, OverallIterations: 25, TraceHistogramMax: 24, EmptinessCheckTime: 26.6ms, AutomataDifference: 46371.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 133499.8ms, InitialAbstractionConstructionTime: 10.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1189 SDtfs, 757 SDslu, 5180 SDs, 0 SdLazy, 4862 SolverSat, 616 SolverUnsat, 17 SolverUnknown, 0 SolverNotchecked, 38652.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1981 GetRequests, 1742 SyntacticMatches, 1 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 9838.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=277occurred in iteration=21, InterpolantAutomatonStates: 249, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 266.0ms AutomataMinimizationTime, 25 MinimizatonAttempts, 138 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 16 LocationsWithAnnotation, 240 PreInvPairs, 324 NumberOfFragments, 1919 HoareAnnotationTreeSize, 240 FomulaSimplifications, 7120 FormulaSimplificationTreeSizeReduction, 258.2ms HoareSimplificationTime, 16 FomulaSimplificationsInter, 2739 FormulaSimplificationTreeSizeReductionInter, 133226.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 224.5ms SsaConstructionTime, 672.6ms SatisfiabilityAnalysisTime, 6875.8ms InterpolantComputationTime, 1958 NumberOfCodeBlocks, 1711 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 1933 ConstructedInterpolants, 0 QuantifiedInterpolants, 7715 SizeOfPredicates, 97 NumberOfNonLiveVariables, 5261 ConjunctsInSsa, 480 ConjunctsInUnsatCore, 25 InterpolantComputations, 7 PerfectInterpolantSequences, 6441/7556 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((((((((!(\old(counter) <= 0) || (((((((1 <= counter && counter <= 1) && q == 0) && b == y) && x == r) && y <= r) && 1 <= y) && b == y * a)) || (((((((q == 0 && x == r) && a % -2 == 0) && a * -1 / -2 * y * 2 == b) && 1 <= y) && b == y * a) && 1 <= r) && 5 <= counter)) || ((((((y * q + r == x && b == y) && q % -2 == 0) && y <= r) && 2 * r < x) && b == y * a) && x < 8 * y)) || ((((((((4 * y <= r && q == 0) && x == r) && 3 <= counter) && 1 <= y) && counter <= 3) && b == y * a) && a == 4) && 1 <= r)) || ((((((2 * y <= r && y * q + r == x) && q % -2 == 0) && 2 * r < x) && b == y * a) && x < 8 * y) && a == 2)) || ((((y * q + r == x && y <= r) && b == y * a) && r < 2 * b) && b <= y)) || (((((y * q + r == x && 7 <= counter) && a == 1) && 1 <= y) && y <= r) && b == y * a)) || !(0 <= \old(counter))) || (((((((q == 0 && x == r) && 1 <= y) && b == y * a) && counter <= 2) && 2 <= counter) && a == 2) && 2 * (b / 2) <= r)) || (((((((4 <= counter && q == 0) && x == r) && 8 * y <= r) && 1 <= y) && b == y * a) && 1 <= r) && a == 8) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((((((!(\old(counter) <= 0) || (((((q == 6 && 6 * y <= x) && 6 <= counter) && y * 6 + r == x) && b == y * a) && x < 8 * y)) || ((((y * q + r == x && a == 1) && 1 <= y) && (r * -1 + -1) / -2 < y + 1) && b == y * a)) || ((((y * q + r == x && 6 <= counter) && a == 1) && 1 <= y) && b == y * a)) || ((((((b + r == x && a == q) && 2 * ((x + r * -1) / 2) <= x) && b * -1 / -2 <= y) && 2 * r < x) && b == y * a) && counter <= 3)) || !(0 <= \old(counter))) || (((((q == 4 && 4 * y <= x) && a == q) && b == y * a) && x < 8 * y) && x == r + b)) || ((((((counter <= 0 && a == q) && 1 <= y) && b == y * a) && a == 0) && 0 <= counter) && x == r + b)) || (((((q == 6 && 6 * y <= x) && y * 6 + r == x) && b == y * a) && b * -1 / -2 <= y) && x < 8 * y)) || ((((((x == q * -1 / -2 * y * 2 + r && q % -2 == 0) && a == q) && 1 <= y) && b == y * a) && x == r + b) && 5 <= counter) RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...