/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:00:08,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:00:08,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:00:08,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:00:08,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:00:08,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:00:08,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:00:08,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:00:08,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:00:08,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:00:08,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:00:08,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:00:08,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:00:08,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:00:08,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:00:08,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:00:08,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:00:08,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:00:08,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:00:08,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:00:08,969 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:00:09,022 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:00:09,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:00:09,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:00:09,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:00:09,025 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:00:09,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:00:09,026 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:00:09,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:00:09,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:00:09,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:00:09,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:00:09,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:00:09,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:00:09,027 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:00:09,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:00:09,028 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:00:09,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:00:09,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:00:09,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:00:09,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:00:09,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:00:09,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:00:09,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:00:09,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:00:09,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:00:09,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:00:09,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:00:09,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:00:09,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:00:09,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:00:09,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:00:09,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:00:09,397 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:00:09,398 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:00:09,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2021-05-02 15:00:09,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef10d38a6/b44fa18680db4a12b2f820dad939e4f7/FLAG4f16097b2 [2021-05-02 15:00:09,903 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:00:09,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2021-05-02 15:00:09,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef10d38a6/b44fa18680db4a12b2f820dad939e4f7/FLAG4f16097b2 [2021-05-02 15:00:09,939 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef10d38a6/b44fa18680db4a12b2f820dad939e4f7 [2021-05-02 15:00:09,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:00:09,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:00:09,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:00:09,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:00:09,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:00:09,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:00:09" (1/1) ... [2021-05-02 15:00:09,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@345d18e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:09, skipping insertion in model container [2021-05-02 15:00:09,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:00:09" (1/1) ... [2021-05-02 15:00:09,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:00:09,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:00:10,116 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2021-05-02 15:00:10,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:00:10,157 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:00:10,210 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2021-05-02 15:00:10,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:00:10,271 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:00:10,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:10 WrapperNode [2021-05-02 15:00:10,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:00:10,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:00:10,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:00:10,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:00:10,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:10" (1/1) ... [2021-05-02 15:00:10,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:10" (1/1) ... [2021-05-02 15:00:10,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:10" (1/1) ... [2021-05-02 15:00:10,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:10" (1/1) ... [2021-05-02 15:00:10,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:10" (1/1) ... [2021-05-02 15:00:10,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:10" (1/1) ... [2021-05-02 15:00:10,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:10" (1/1) ... [2021-05-02 15:00:10,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:00:10,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:00:10,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:00:10,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:00:10,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:00:10,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:00:10,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:00:10,387 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:00:10,387 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:00:10,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:00:10,388 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:00:10,388 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:00:10,388 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:00:10,389 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:00:10,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:00:10,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:00:10,389 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:00:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:00:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:00:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:00:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:00:10,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:00:10,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:00:10,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:00:10,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:00:10,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:00:10,682 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 15:00:10,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:00:10 BoogieIcfgContainer [2021-05-02 15:00:10,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:00:10,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:00:10,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:00:10,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:00:10,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:00:09" (1/3) ... [2021-05-02 15:00:10,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52efd9fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:00:10, skipping insertion in model container [2021-05-02 15:00:10,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:10" (2/3) ... [2021-05-02 15:00:10,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52efd9fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:00:10, skipping insertion in model container [2021-05-02 15:00:10,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:00:10" (3/3) ... [2021-05-02 15:00:10,689 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.c [2021-05-02 15:00:10,694 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:00:10,697 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:00:10,713 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:00:10,733 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:00:10,733 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:00:10,733 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:00:10,733 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:00:10,733 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:00:10,733 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:00:10,734 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:00:10,734 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:00:10,747 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:00:10,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 15:00:10,751 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:10,751 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:10,751 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:10,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:10,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2021-05-02 15:00:10,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:10,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396262508] [2021-05-02 15:00:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:11,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:00:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:11,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:00:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:11,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 15:00:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:00:11,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:11,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396262508] [2021-05-02 15:00:11,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396262508] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:11,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:11,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:00:11,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613908702] [2021-05-02 15:00:11,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:00:11,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:11,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:00:11,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:00:11,083 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:11,260 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2021-05-02 15:00:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:00:11,262 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 15:00:11,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:11,268 INFO L225 Difference]: With dead ends: 74 [2021-05-02 15:00:11,268 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 15:00:11,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:00:11,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 15:00:11,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 15:00:11,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:00:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-02 15:00:11,323 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-02 15:00:11,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:11,323 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-02 15:00:11,324 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-02 15:00:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:00:11,326 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:11,326 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:11,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:00:11,326 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2021-05-02 15:00:11,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:11,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304588992] [2021-05-02 15:00:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:11,344 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:11,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532678627] [2021-05-02 15:00:11,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:11,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:00:11,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:11,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:11,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:11,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:11,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:11,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:00:11,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:11,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304588992] [2021-05-02 15:00:11,601 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:11,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532678627] [2021-05-02 15:00:11,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532678627] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:11,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:11,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:00:11,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616053020] [2021-05-02 15:00:11,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:00:11,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:11,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:00:11,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:00:11,603 INFO L87 Difference]: Start difference. First operand 35 states and 45 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:11,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:11,628 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-05-02 15:00:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:00:11,629 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:00:11,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:11,630 INFO L225 Difference]: With dead ends: 44 [2021-05-02 15:00:11,630 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 15:00:11,631 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:00:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 15:00:11,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 15:00:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:00:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-02 15:00:11,639 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2021-05-02 15:00:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:11,640 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-02 15:00:11,641 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:11,641 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-02 15:00:11,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 15:00:11,650 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:11,650 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:11,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:00:11,861 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:11,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:11,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2021-05-02 15:00:11,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:11,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623417867] [2021-05-02 15:00:11,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:11,875 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:11,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793523614] [2021-05-02 15:00:11,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:11,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:00:11,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:12,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:00:12,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:12,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623417867] [2021-05-02 15:00:12,063 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:12,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793523614] [2021-05-02 15:00:12,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793523614] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:12,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:12,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:00:12,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240402208] [2021-05-02 15:00:12,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:00:12,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:12,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:00:12,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:00:12,065 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 15:00:12,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:12,119 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2021-05-02 15:00:12,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:00:12,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-02 15:00:12,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:12,120 INFO L225 Difference]: With dead ends: 57 [2021-05-02 15:00:12,120 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 15:00:12,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 15:00:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-02 15:00:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:00:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-02 15:00:12,128 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-05-02 15:00:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:12,128 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-02 15:00:12,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 15:00:12,128 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-02 15:00:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 15:00:12,129 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:12,129 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:12,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:12,352 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:12,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:12,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2021-05-02 15:00:12,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:12,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911305692] [2021-05-02 15:00:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:12,365 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:12,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626742901] [2021-05-02 15:00:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:12,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:00:12,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:12,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:12,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:12,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:12,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:12,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:12,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:12,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:12,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:00:12,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:12,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911305692] [2021-05-02 15:00:12,527 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:12,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626742901] [2021-05-02 15:00:12,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626742901] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:12,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:12,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:00:12,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390637383] [2021-05-02 15:00:12,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:00:12,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:12,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:00:12,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:00:12,529 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:12,558 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2021-05-02 15:00:12,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:00:12,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 15:00:12,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:12,559 INFO L225 Difference]: With dead ends: 62 [2021-05-02 15:00:12,560 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 15:00:12,560 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:00:12,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 15:00:12,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 15:00:12,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:00:12,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-02 15:00:12,571 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2021-05-02 15:00:12,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:12,571 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-02 15:00:12,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:12,571 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-02 15:00:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 15:00:12,572 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:12,572 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:12,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:12,797 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash 795698770, now seen corresponding path program 1 times [2021-05-02 15:00:12,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:12,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614867857] [2021-05-02 15:00:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:12,816 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:12,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830517981] [2021-05-02 15:00:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:12,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:00:12,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:12,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:12,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:00:13,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:13,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614867857] [2021-05-02 15:00:13,044 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:13,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830517981] [2021-05-02 15:00:13,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830517981] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:13,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:13,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 15:00:13,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274708111] [2021-05-02 15:00:13,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:00:13,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:13,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:00:13,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:13,047 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:13,169 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2021-05-02 15:00:13,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:00:13,169 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 15:00:13,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:13,171 INFO L225 Difference]: With dead ends: 58 [2021-05-02 15:00:13,171 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 15:00:13,171 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:00:13,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 15:00:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 15:00:13,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:00:13,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2021-05-02 15:00:13,196 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2021-05-02 15:00:13,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:13,196 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2021-05-02 15:00:13,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:13,197 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2021-05-02 15:00:13,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 15:00:13,197 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:13,198 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:13,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:13,398 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:13,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:13,399 INFO L82 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 1 times [2021-05-02 15:00:13,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:13,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052637362] [2021-05-02 15:00:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:13,411 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:13,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126723524] [2021-05-02 15:00:13,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:13,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:00:13,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:13,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:00:13,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:13,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052637362] [2021-05-02 15:00:13,582 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:13,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126723524] [2021-05-02 15:00:13,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126723524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:13,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:13,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:00:13,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260459893] [2021-05-02 15:00:13,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:00:13,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:13,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:00:13,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:00:13,584 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:13,637 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2021-05-02 15:00:13,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:00:13,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-05-02 15:00:13,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:13,642 INFO L225 Difference]: With dead ends: 67 [2021-05-02 15:00:13,642 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:00:13,644 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:00:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:00:13,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 15:00:13,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:00:13,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-05-02 15:00:13,665 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2021-05-02 15:00:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:13,666 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-05-02 15:00:13,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-05-02 15:00:13,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 15:00:13,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:13,667 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:13,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:00:13,873 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:13,873 INFO L82 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 1 times [2021-05-02 15:00:13,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:13,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796132246] [2021-05-02 15:00:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:13,881 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:13,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153934135] [2021-05-02 15:00:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:13,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:00:13,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:13,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:13,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:00:14,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:14,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796132246] [2021-05-02 15:00:14,037 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:14,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153934135] [2021-05-02 15:00:14,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153934135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:14,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:14,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:00:14,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980495006] [2021-05-02 15:00:14,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:00:14,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:14,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:00:14,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:14,041 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:14,250 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2021-05-02 15:00:14,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:00:14,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-02 15:00:14,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:14,252 INFO L225 Difference]: With dead ends: 138 [2021-05-02 15:00:14,252 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 15:00:14,252 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:00:14,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 15:00:14,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2021-05-02 15:00:14,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 15:00:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2021-05-02 15:00:14,270 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2021-05-02 15:00:14,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:14,270 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2021-05-02 15:00:14,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:14,270 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2021-05-02 15:00:14,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 15:00:14,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:14,271 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:14,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:14,489 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:14,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:14,489 INFO L82 PathProgramCache]: Analyzing trace with hash 495607521, now seen corresponding path program 1 times [2021-05-02 15:00:14,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:14,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810522004] [2021-05-02 15:00:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:14,501 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:14,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151252461] [2021-05-02 15:00:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:14,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:00:14,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:14,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:00:14,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:14,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810522004] [2021-05-02 15:00:14,702 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:14,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151252461] [2021-05-02 15:00:14,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151252461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:14,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:14,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:00:14,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475943335] [2021-05-02 15:00:14,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:00:14,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:14,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:00:14,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:14,704 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:00:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:14,795 INFO L93 Difference]: Finished difference Result 95 states and 128 transitions. [2021-05-02 15:00:14,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:00:14,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 15:00:14,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:14,797 INFO L225 Difference]: With dead ends: 95 [2021-05-02 15:00:14,797 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 15:00:14,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:14,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 15:00:14,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 15:00:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 70 states have internal predecessors, (93), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 15:00:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2021-05-02 15:00:14,822 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 34 [2021-05-02 15:00:14,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:14,823 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2021-05-02 15:00:14,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:00:14,823 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2021-05-02 15:00:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 15:00:14,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:14,829 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:15,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:15,052 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:15,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 1 times [2021-05-02 15:00:15,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:15,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211235619] [2021-05-02 15:00:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:15,072 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:15,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857732963] [2021-05-02 15:00:15,072 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 15:00:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:15,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:00:15,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:15,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,256 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 15:00:15,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:15,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211235619] [2021-05-02 15:00:15,257 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:15,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857732963] [2021-05-02 15:00:15,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857732963] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:15,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:15,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:00:15,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160224552] [2021-05-02 15:00:15,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:00:15,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:15,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:00:15,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:00:15,262 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:15,296 INFO L93 Difference]: Finished difference Result 135 states and 184 transitions. [2021-05-02 15:00:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:00:15,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-05-02 15:00:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:15,299 INFO L225 Difference]: With dead ends: 135 [2021-05-02 15:00:15,299 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 15:00:15,300 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:00:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 15:00:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-02 15:00:15,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 72 states have internal predecessors, (95), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 15:00:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2021-05-02 15:00:15,313 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 35 [2021-05-02 15:00:15,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:15,313 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2021-05-02 15:00:15,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:15,314 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2021-05-02 15:00:15,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:00:15,316 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:15,316 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:15,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 15:00:15,529 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:15,529 INFO L82 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 1 times [2021-05-02 15:00:15,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:15,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404929990] [2021-05-02 15:00:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:15,540 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:15,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95051151] [2021-05-02 15:00:15,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:15,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:00:15,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:15,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:00:15,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:15,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404929990] [2021-05-02 15:00:15,707 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:15,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95051151] [2021-05-02 15:00:15,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95051151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:15,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:15,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:00:15,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407579670] [2021-05-02 15:00:15,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:00:15,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:15,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:00:15,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:00:15,709 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:15,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:15,768 INFO L93 Difference]: Finished difference Result 171 states and 233 transitions. [2021-05-02 15:00:15,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:00:15,769 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 15:00:15,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:15,771 INFO L225 Difference]: With dead ends: 171 [2021-05-02 15:00:15,771 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 15:00:15,774 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:15,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 15:00:15,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-05-02 15:00:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:00:15,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2021-05-02 15:00:15,801 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 36 [2021-05-02 15:00:15,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:15,801 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2021-05-02 15:00:15,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:15,801 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2021-05-02 15:00:15,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:00:15,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:15,802 INFO L523 BasicCegarLoop]: trace histogram [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 15:00:16,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:16,021 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:16,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:16,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 1 times [2021-05-02 15:00:16,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:16,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704679526] [2021-05-02 15:00:16,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:16,029 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:16,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112142601] [2021-05-02 15:00:16,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:16,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:00:16,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:16,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:00:16,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:16,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704679526] [2021-05-02 15:00:16,221 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:16,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112142601] [2021-05-02 15:00:16,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112142601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:16,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:16,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:00:16,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785653472] [2021-05-02 15:00:16,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:00:16,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:16,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:00:16,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:16,223 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:16,363 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2021-05-02 15:00:16,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:00:16,363 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 15:00:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:16,365 INFO L225 Difference]: With dead ends: 154 [2021-05-02 15:00:16,365 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 15:00:16,365 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:00:16,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 15:00:16,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-05-02 15:00:16,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 15:00:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2021-05-02 15:00:16,376 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2021-05-02 15:00:16,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:16,376 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2021-05-02 15:00:16,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:16,377 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2021-05-02 15:00:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 15:00:16,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:16,377 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 15:00:16,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:16,593 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:16,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:16,593 INFO L82 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 2 times [2021-05-02 15:00:16,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:16,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649410483] [2021-05-02 15:00:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:16,606 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:16,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324502115] [2021-05-02 15:00:16,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:16,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:16,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:16,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 15:00:16,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:16,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:00:16,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:16,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649410483] [2021-05-02 15:00:16,783 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:16,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324502115] [2021-05-02 15:00:16,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324502115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:16,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:16,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:00:16,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921513286] [2021-05-02 15:00:16,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:00:16,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:16,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:00:16,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:16,785 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:16,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:16,883 INFO L93 Difference]: Finished difference Result 189 states and 247 transitions. [2021-05-02 15:00:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:00:16,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-05-02 15:00:16,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:16,885 INFO L225 Difference]: With dead ends: 189 [2021-05-02 15:00:16,885 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 15:00:16,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 15:00:16,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2021-05-02 15:00:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.31496062992126) internal successors, (167), 129 states have internal predecessors, (167), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 15:00:16,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2021-05-02 15:00:16,898 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 37 [2021-05-02 15:00:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:16,898 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2021-05-02 15:00:16,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2021-05-02 15:00:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:00:16,899 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:16,899 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:17,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 15:00:17,117 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:17,117 INFO L82 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 1 times [2021-05-02 15:00:17,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:17,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089397326] [2021-05-02 15:00:17,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:17,124 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:17,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671347675] [2021-05-02 15:00:17,125 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 15:00:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:17,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:00:17,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:17,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:17,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:17,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:17,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:17,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:17,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:17,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:17,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 15:00:17,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:17,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089397326] [2021-05-02 15:00:17,300 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:17,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671347675] [2021-05-02 15:00:17,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671347675] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:17,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:17,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 15:00:17,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603541190] [2021-05-02 15:00:17,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:00:17,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:17,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:00:17,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:17,302 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:00:17,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:17,450 INFO L93 Difference]: Finished difference Result 195 states and 258 transitions. [2021-05-02 15:00:17,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:00:17,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 15:00:17,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:17,455 INFO L225 Difference]: With dead ends: 195 [2021-05-02 15:00:17,455 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 15:00:17,456 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:17,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 15:00:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-02 15:00:17,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 141 states have internal predecessors, (181), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 15:00:17,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 253 transitions. [2021-05-02 15:00:17,471 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 253 transitions. Word has length 39 [2021-05-02 15:00:17,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:17,472 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 253 transitions. [2021-05-02 15:00:17,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:00:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 253 transitions. [2021-05-02 15:00:17,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:00:17,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:17,473 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:17,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 15:00:17,689 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:17,689 INFO L82 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 1 times [2021-05-02 15:00:17,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:17,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694361820] [2021-05-02 15:00:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:17,698 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:17,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790590715] [2021-05-02 15:00:17,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:17,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 15:00:17,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:17,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:17,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:17,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:17,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:17,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:17,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:00:17,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:17,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694361820] [2021-05-02 15:00:17,949 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:17,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790590715] [2021-05-02 15:00:17,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790590715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:17,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:17,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:00:17,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743573509] [2021-05-02 15:00:17,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:00:17,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:17,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:00:17,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:17,950 INFO L87 Difference]: Start difference. First operand 192 states and 253 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:00:18,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:18,169 INFO L93 Difference]: Finished difference Result 200 states and 260 transitions. [2021-05-02 15:00:18,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:00:18,169 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-05-02 15:00:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:18,170 INFO L225 Difference]: With dead ends: 200 [2021-05-02 15:00:18,170 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 15:00:18,171 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:18,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 15:00:18,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2021-05-02 15:00:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 142 states have (on average 1.295774647887324) internal successors, (184), 144 states have internal predecessors, (184), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 15:00:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 256 transitions. [2021-05-02 15:00:18,185 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 256 transitions. Word has length 41 [2021-05-02 15:00:18,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:18,185 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 256 transitions. [2021-05-02 15:00:18,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:00:18,186 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 256 transitions. [2021-05-02 15:00:18,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 15:00:18,186 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:18,186 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:18,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:00:18,409 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:18,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:18,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 1 times [2021-05-02 15:00:18,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:18,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136427040] [2021-05-02 15:00:18,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:18,417 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:18,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042457866] [2021-05-02 15:00:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:18,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:00:18,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:18,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 15:00:18,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:18,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136427040] [2021-05-02 15:00:18,563 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:18,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042457866] [2021-05-02 15:00:18,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042457866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:18,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:18,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:00:18,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272629545] [2021-05-02 15:00:18,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:00:18,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:18,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:00:18,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:00:18,564 INFO L87 Difference]: Start difference. First operand 196 states and 256 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:00:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:18,642 INFO L93 Difference]: Finished difference Result 260 states and 359 transitions. [2021-05-02 15:00:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:00:18,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-05-02 15:00:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:18,644 INFO L225 Difference]: With dead ends: 260 [2021-05-02 15:00:18,645 INFO L226 Difference]: Without dead ends: 258 [2021-05-02 15:00:18,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-02 15:00:18,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 230. [2021-05-02 15:00:18,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 155 states have (on average 1.2967741935483872) internal successors, (201), 162 states have internal predecessors, (201), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 15:00:18,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 313 transitions. [2021-05-02 15:00:18,662 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 313 transitions. Word has length 44 [2021-05-02 15:00:18,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:18,662 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 313 transitions. [2021-05-02 15:00:18,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:00:18,663 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 313 transitions. [2021-05-02 15:00:18,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 15:00:18,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:18,663 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:18,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:18,886 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:18,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:18,886 INFO L82 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 1 times [2021-05-02 15:00:18,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:18,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263520316] [2021-05-02 15:00:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:18,893 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:18,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083600347] [2021-05-02 15:00:18,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:18,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 15:00:18,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:19,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:00:19,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:19,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263520316] [2021-05-02 15:00:19,145 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:19,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083600347] [2021-05-02 15:00:19,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083600347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:19,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:19,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:00:19,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179751574] [2021-05-02 15:00:19,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:00:19,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:19,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:00:19,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:19,147 INFO L87 Difference]: Start difference. First operand 230 states and 313 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:19,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:19,255 INFO L93 Difference]: Finished difference Result 379 states and 536 transitions. [2021-05-02 15:00:19,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:00:19,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-05-02 15:00:19,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:19,257 INFO L225 Difference]: With dead ends: 379 [2021-05-02 15:00:19,257 INFO L226 Difference]: Without dead ends: 241 [2021-05-02 15:00:19,258 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-02 15:00:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2021-05-02 15:00:19,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 162 states have (on average 1.2839506172839505) internal successors, (208), 168 states have internal predecessors, (208), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 15:00:19,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 320 transitions. [2021-05-02 15:00:19,276 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 320 transitions. Word has length 42 [2021-05-02 15:00:19,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:19,277 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 320 transitions. [2021-05-02 15:00:19,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 320 transitions. [2021-05-02 15:00:19,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 15:00:19,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:19,277 INFO L523 BasicCegarLoop]: trace histogram [4, 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] [2021-05-02 15:00:19,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 15:00:19,499 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:19,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:19,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1912500411, now seen corresponding path program 2 times [2021-05-02 15:00:19,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:19,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570223454] [2021-05-02 15:00:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:19,513 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:19,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854110183] [2021-05-02 15:00:19,514 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 15:00:19,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:19,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:19,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:00:19,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:19,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 15:00:19,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:19,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570223454] [2021-05-02 15:00:19,678 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:19,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854110183] [2021-05-02 15:00:19,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854110183] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:19,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:19,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:00:19,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052809498] [2021-05-02 15:00:19,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:00:19,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:19,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:00:19,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:00:19,679 INFO L87 Difference]: Start difference. First operand 237 states and 320 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 15:00:19,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:19,772 INFO L93 Difference]: Finished difference Result 445 states and 659 transitions. [2021-05-02 15:00:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:00:19,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-05-02 15:00:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:19,775 INFO L225 Difference]: With dead ends: 445 [2021-05-02 15:00:19,775 INFO L226 Difference]: Without dead ends: 375 [2021-05-02 15:00:19,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:00:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-02 15:00:19,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 261. [2021-05-02 15:00:19,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 186 states have (on average 1.3010752688172043) internal successors, (242), 192 states have internal predecessors, (242), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 15:00:19,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 354 transitions. [2021-05-02 15:00:19,800 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 354 transitions. Word has length 43 [2021-05-02 15:00:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:19,800 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 354 transitions. [2021-05-02 15:00:19,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 15:00:19,800 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 354 transitions. [2021-05-02 15:00:19,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 15:00:19,801 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:19,801 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:20,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 15:00:20,015 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:20,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:20,015 INFO L82 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 1 times [2021-05-02 15:00:20,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:20,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164483086] [2021-05-02 15:00:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:20,023 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:20,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525017333] [2021-05-02 15:00:20,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:20,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:00:20,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:20,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:20,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:20,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:20,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:20,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:20,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:20,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:20,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:20,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:20,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:20,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 15:00:20,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:20,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164483086] [2021-05-02 15:00:20,225 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:20,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525017333] [2021-05-02 15:00:20,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525017333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:20,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:20,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:00:20,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997700656] [2021-05-02 15:00:20,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:00:20,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:20,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:00:20,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:00:20,228 INFO L87 Difference]: Start difference. First operand 261 states and 354 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:00:20,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:20,526 INFO L93 Difference]: Finished difference Result 337 states and 476 transitions. [2021-05-02 15:00:20,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 15:00:20,527 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-05-02 15:00:20,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:20,528 INFO L225 Difference]: With dead ends: 337 [2021-05-02 15:00:20,529 INFO L226 Difference]: Without dead ends: 335 [2021-05-02 15:00:20,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-02 15:00:20,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-05-02 15:00:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 292. [2021-05-02 15:00:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 200 states have (on average 1.315) internal successors, (263), 208 states have internal predecessors, (263), 73 states have call successors, (73), 19 states have call predecessors, (73), 18 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 15:00:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 407 transitions. [2021-05-02 15:00:20,552 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 407 transitions. Word has length 46 [2021-05-02 15:00:20,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:20,552 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 407 transitions. [2021-05-02 15:00:20,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:00:20,552 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 407 transitions. [2021-05-02 15:00:20,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 15:00:20,553 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:20,553 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1] [2021-05-02 15:00:20,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 15:00:20,769 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:20,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:20,769 INFO L82 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 1 times [2021-05-02 15:00:20,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:20,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243612041] [2021-05-02 15:00:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:20,777 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:20,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561245407] [2021-05-02 15:00:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:00:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:20,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 15:00:20,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:20,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:20,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:20,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:20,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:20,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:21,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:21,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:21,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:21,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:21,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:21,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:21,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:00:21,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:21,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243612041] [2021-05-02 15:00:21,283 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:21,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561245407] [2021-05-02 15:00:21,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561245407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:21,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:21,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 15:00:21,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654493832] [2021-05-02 15:00:21,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 15:00:21,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:21,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 15:00:21,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:00:21,285 INFO L87 Difference]: Start difference. First operand 292 states and 407 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 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 15:00:21,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:21,831 INFO L93 Difference]: Finished difference Result 421 states and 594 transitions. [2021-05-02 15:00:21,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 15:00:21,832 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 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 58 [2021-05-02 15:00:21,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:21,834 INFO L225 Difference]: With dead ends: 421 [2021-05-02 15:00:21,834 INFO L226 Difference]: Without dead ends: 322 [2021-05-02 15:00:21,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 438.7ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-02 15:00:21,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-02 15:00:21,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2021-05-02 15:00:21,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 217 states have (on average 1.3133640552995391) internal successors, (285), 226 states have internal predecessors, (285), 81 states have call successors, (81), 21 states have call predecessors, (81), 20 states have return successors, (79), 71 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 15:00:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 445 transitions. [2021-05-02 15:00:21,859 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 445 transitions. Word has length 58 [2021-05-02 15:00:21,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:21,859 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 445 transitions. [2021-05-02 15:00:21,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 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 15:00:21,859 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 445 transitions. [2021-05-02 15:00:21,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 15:00:21,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:21,860 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:22,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:22,073 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:22,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:22,073 INFO L82 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 1 times [2021-05-02 15:00:22,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:22,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904568805] [2021-05-02 15:00:22,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:22,081 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:22,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172641595] [2021-05-02 15:00:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:00:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:22,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:00:22,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:22,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:00:22,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:22,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904568805] [2021-05-02 15:00:22,299 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:22,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172641595] [2021-05-02 15:00:22,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172641595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:22,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:22,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:00:22,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485574649] [2021-05-02 15:00:22,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:00:22,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:22,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:00:22,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:22,301 INFO L87 Difference]: Start difference. First operand 319 states and 445 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:00:22,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:22,418 INFO L93 Difference]: Finished difference Result 508 states and 703 transitions. [2021-05-02 15:00:22,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:00:22,419 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2021-05-02 15:00:22,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:22,421 INFO L225 Difference]: With dead ends: 508 [2021-05-02 15:00:22,421 INFO L226 Difference]: Without dead ends: 376 [2021-05-02 15:00:22,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:00:22,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-02 15:00:22,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 363. [2021-05-02 15:00:22,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 249 states have (on average 1.2811244979919678) internal successors, (319), 257 states have internal predecessors, (319), 85 states have call successors, (85), 29 states have call predecessors, (85), 28 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-02 15:00:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 487 transitions. [2021-05-02 15:00:22,448 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 487 transitions. Word has length 63 [2021-05-02 15:00:22,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:22,448 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 487 transitions. [2021-05-02 15:00:22,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:00:22,449 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 487 transitions. [2021-05-02 15:00:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 15:00:22,449 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:22,450 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:22,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:22,665 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:22,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 1 times [2021-05-02 15:00:22,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:22,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456791983] [2021-05-02 15:00:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:22,678 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:22,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637514135] [2021-05-02 15:00:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:00:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:22,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:00:22,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:22,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:00:22,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:22,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456791983] [2021-05-02 15:00:22,905 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:22,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637514135] [2021-05-02 15:00:22,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637514135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:22,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:22,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:00:22,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656368455] [2021-05-02 15:00:22,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:00:22,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:22,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:00:22,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:22,907 INFO L87 Difference]: Start difference. First operand 363 states and 487 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:00:23,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:23,092 INFO L93 Difference]: Finished difference Result 457 states and 595 transitions. [2021-05-02 15:00:23,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 15:00:23,092 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2021-05-02 15:00:23,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:23,095 INFO L225 Difference]: With dead ends: 457 [2021-05-02 15:00:23,095 INFO L226 Difference]: Without dead ends: 450 [2021-05-02 15:00:23,095 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:00:23,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-02 15:00:23,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 430. [2021-05-02 15:00:23,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 295 states have (on average 1.264406779661017) internal successors, (373), 307 states have internal predecessors, (373), 98 states have call successors, (98), 37 states have call predecessors, (98), 36 states have return successors, (95), 85 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-02 15:00:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 566 transitions. [2021-05-02 15:00:23,130 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 566 transitions. Word has length 64 [2021-05-02 15:00:23,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:23,130 INFO L480 AbstractCegarLoop]: Abstraction has 430 states and 566 transitions. [2021-05-02 15:00:23,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:00:23,130 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 566 transitions. [2021-05-02 15:00:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 15:00:23,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:23,133 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2021-05-02 15:00:23,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 15:00:23,357 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:23,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:23,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 1 times [2021-05-02 15:00:23,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:23,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106826967] [2021-05-02 15:00:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:23,364 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:23,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455393983] [2021-05-02 15:00:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:00:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:23,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 15:00:23,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:23,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-02 15:00:23,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:23,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106826967] [2021-05-02 15:00:23,599 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:23,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455393983] [2021-05-02 15:00:23,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455393983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:23,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:23,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:00:23,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033855093] [2021-05-02 15:00:23,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:00:23,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:23,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:00:23,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:23,600 INFO L87 Difference]: Start difference. First operand 430 states and 566 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 15:00:23,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:23,802 INFO L93 Difference]: Finished difference Result 460 states and 605 transitions. [2021-05-02 15:00:23,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:00:23,802 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2021-05-02 15:00:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:23,805 INFO L225 Difference]: With dead ends: 460 [2021-05-02 15:00:23,805 INFO L226 Difference]: Without dead ends: 458 [2021-05-02 15:00:23,805 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:00:23,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-02 15:00:23,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 440. [2021-05-02 15:00:23,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 301 states have (on average 1.2624584717607974) internal successors, (380), 313 states have internal predecessors, (380), 101 states have call successors, (101), 38 states have call predecessors, (101), 37 states have return successors, (98), 88 states have call predecessors, (98), 98 states have call successors, (98) [2021-05-02 15:00:23,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 579 transitions. [2021-05-02 15:00:23,833 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 579 transitions. Word has length 67 [2021-05-02 15:00:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:23,833 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 579 transitions. [2021-05-02 15:00:23,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 15:00:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 579 transitions. [2021-05-02 15:00:23,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 15:00:23,834 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:23,834 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:24,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 15:00:24,057 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:24,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:24,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1261753774, now seen corresponding path program 2 times [2021-05-02 15:00:24,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:24,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281830073] [2021-05-02 15:00:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:24,064 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:24,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347215262] [2021-05-02 15:00:24,064 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 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 15:00:24,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:24,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:24,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 15:00:24,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:24,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:00:24,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:24,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281830073] [2021-05-02 15:00:24,269 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:24,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347215262] [2021-05-02 15:00:24,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347215262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:24,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:24,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:00:24,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300977476] [2021-05-02 15:00:24,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:00:24,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:24,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:00:24,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:24,270 INFO L87 Difference]: Start difference. First operand 440 states and 579 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:00:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:24,672 INFO L93 Difference]: Finished difference Result 783 states and 1150 transitions. [2021-05-02 15:00:24,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 15:00:24,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-05-02 15:00:24,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:24,677 INFO L225 Difference]: With dead ends: 783 [2021-05-02 15:00:24,677 INFO L226 Difference]: Without dead ends: 776 [2021-05-02 15:00:24,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-05-02 15:00:24,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-05-02 15:00:24,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 502. [2021-05-02 15:00:24,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 347 states have (on average 1.2881844380403458) internal successors, (447), 359 states have internal predecessors, (447), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 104 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 15:00:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 678 transitions. [2021-05-02 15:00:24,720 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 678 transitions. Word has length 65 [2021-05-02 15:00:24,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:24,720 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 678 transitions. [2021-05-02 15:00:24,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:00:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 678 transitions. [2021-05-02 15:00:24,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 15:00:24,722 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:24,722 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:24,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:24,945 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:24,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:24,945 INFO L82 PathProgramCache]: Analyzing trace with hash 365174246, now seen corresponding path program 1 times [2021-05-02 15:00:24,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:24,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119127293] [2021-05-02 15:00:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:24,952 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:24,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200787033] [2021-05-02 15:00:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:00:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:25,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:00:25,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:25,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:00:25,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:25,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119127293] [2021-05-02 15:00:25,147 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:25,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200787033] [2021-05-02 15:00:25,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200787033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:25,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:25,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:00:25,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106373792] [2021-05-02 15:00:25,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:00:25,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:25,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:00:25,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:25,148 INFO L87 Difference]: Start difference. First operand 502 states and 678 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:00:25,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:25,280 INFO L93 Difference]: Finished difference Result 755 states and 1057 transitions. [2021-05-02 15:00:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:00:25,280 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-05-02 15:00:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:25,283 INFO L225 Difference]: With dead ends: 755 [2021-05-02 15:00:25,283 INFO L226 Difference]: Without dead ends: 504 [2021-05-02 15:00:25,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:00:25,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-05-02 15:00:25,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 502. [2021-05-02 15:00:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 347 states have (on average 1.2795389048991355) internal successors, (444), 359 states have internal predecessors, (444), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 104 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 15:00:25,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 675 transitions. [2021-05-02 15:00:25,318 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 675 transitions. Word has length 65 [2021-05-02 15:00:25,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:25,318 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 675 transitions. [2021-05-02 15:00:25,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:00:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 675 transitions. [2021-05-02 15:00:25,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 15:00:25,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:25,319 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:25,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 15:00:25,533 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:25,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:25,533 INFO L82 PathProgramCache]: Analyzing trace with hash -544828664, now seen corresponding path program 1 times [2021-05-02 15:00:25,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:25,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981983322] [2021-05-02 15:00:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:25,543 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:25,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364110665] [2021-05-02 15:00:25,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:00:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:25,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 15:00:25,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:25,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 15:00:25,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:25,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981983322] [2021-05-02 15:00:25,716 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:25,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364110665] [2021-05-02 15:00:25,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364110665] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:25,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:25,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:00:25,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298823037] [2021-05-02 15:00:25,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:00:25,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:25,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:00:25,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:00:25,718 INFO L87 Difference]: Start difference. First operand 502 states and 675 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:00:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:25,793 INFO L93 Difference]: Finished difference Result 860 states and 1209 transitions. [2021-05-02 15:00:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:00:25,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2021-05-02 15:00:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:25,802 INFO L225 Difference]: With dead ends: 860 [2021-05-02 15:00:25,802 INFO L226 Difference]: Without dead ends: 584 [2021-05-02 15:00:25,803 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:00:25,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-05-02 15:00:25,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 528. [2021-05-02 15:00:25,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 373 states have (on average 1.2868632707774799) internal successors, (480), 379 states have internal predecessors, (480), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 110 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 15:00:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 711 transitions. [2021-05-02 15:00:25,840 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 711 transitions. Word has length 69 [2021-05-02 15:00:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:25,840 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 711 transitions. [2021-05-02 15:00:25,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:00:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 711 transitions. [2021-05-02 15:00:25,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 15:00:25,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:25,841 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:26,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:26,057 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:26,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:26,057 INFO L82 PathProgramCache]: Analyzing trace with hash -996119216, now seen corresponding path program 2 times [2021-05-02 15:00:26,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:26,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025614220] [2021-05-02 15:00:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:26,063 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:26,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403381786] [2021-05-02 15:00:26,064 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:26,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:26,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:26,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:00:26,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:26,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:00:26,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:26,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025614220] [2021-05-02 15:00:26,283 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:26,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403381786] [2021-05-02 15:00:26,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403381786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:26,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:26,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:00:26,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588178121] [2021-05-02 15:00:26,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:00:26,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:26,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:00:26,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:26,284 INFO L87 Difference]: Start difference. First operand 528 states and 711 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:00:26,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:26,465 INFO L93 Difference]: Finished difference Result 857 states and 1194 transitions. [2021-05-02 15:00:26,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 15:00:26,466 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2021-05-02 15:00:26,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:26,468 INFO L225 Difference]: With dead ends: 857 [2021-05-02 15:00:26,468 INFO L226 Difference]: Without dead ends: 551 [2021-05-02 15:00:26,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:00:26,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-05-02 15:00:26,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 540. [2021-05-02 15:00:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 383 states have (on average 1.279373368146214) internal successors, (490), 386 states have internal predecessors, (490), 118 states have call successors, (118), 39 states have call predecessors, (118), 38 states have return successors, (115), 114 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-02 15:00:26,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 723 transitions. [2021-05-02 15:00:26,502 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 723 transitions. Word has length 69 [2021-05-02 15:00:26,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:26,502 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 723 transitions. [2021-05-02 15:00:26,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:00:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 723 transitions. [2021-05-02 15:00:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 15:00:26,503 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:26,504 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1] [2021-05-02 15:00:26,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 15:00:26,721 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:26,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:26,721 INFO L82 PathProgramCache]: Analyzing trace with hash 862858316, now seen corresponding path program 2 times [2021-05-02 15:00:26,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:26,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665177502] [2021-05-02 15:00:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:26,727 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:26,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562407737] [2021-05-02 15:00:26,727 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:26,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:26,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:26,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:00:26,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:26,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:00:26,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:26,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665177502] [2021-05-02 15:00:26,957 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:26,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562407737] [2021-05-02 15:00:26,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562407737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:26,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:26,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:00:26,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100105521] [2021-05-02 15:00:26,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:00:26,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:26,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:00:26,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:00:26,958 INFO L87 Difference]: Start difference. First operand 540 states and 723 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:00:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:27,233 INFO L93 Difference]: Finished difference Result 852 states and 1151 transitions. [2021-05-02 15:00:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 15:00:27,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2021-05-02 15:00:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:27,237 INFO L225 Difference]: With dead ends: 852 [2021-05-02 15:00:27,237 INFO L226 Difference]: Without dead ends: 660 [2021-05-02 15:00:27,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:00:27,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-05-02 15:00:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 627. [2021-05-02 15:00:27,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 441 states have (on average 1.256235827664399) internal successors, (554), 445 states have internal predecessors, (554), 135 states have call successors, (135), 51 states have call predecessors, (135), 50 states have return successors, (131), 130 states have call predecessors, (131), 131 states have call successors, (131) [2021-05-02 15:00:27,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 820 transitions. [2021-05-02 15:00:27,280 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 820 transitions. Word has length 70 [2021-05-02 15:00:27,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:27,280 INFO L480 AbstractCegarLoop]: Abstraction has 627 states and 820 transitions. [2021-05-02 15:00:27,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:00:27,280 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 820 transitions. [2021-05-02 15:00:27,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 15:00:27,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:27,281 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:27,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 15:00:27,497 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:27,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 1 times [2021-05-02 15:00:27,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:27,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890660664] [2021-05-02 15:00:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:27,503 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:27,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272684072] [2021-05-02 15:00:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:27,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 15:00:27,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:27,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:00:28,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:28,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890660664] [2021-05-02 15:00:28,037 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:28,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272684072] [2021-05-02 15:00:28,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272684072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:28,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:28,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 15:00:28,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942789775] [2021-05-02 15:00:28,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 15:00:28,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:28,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 15:00:28,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 15:00:28,039 INFO L87 Difference]: Start difference. First operand 627 states and 820 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:00:29,610 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-02 15:00:30,167 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-02 15:00:30,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:30,754 INFO L93 Difference]: Finished difference Result 800 states and 1079 transitions. [2021-05-02 15:00:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 15:00:30,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 70 [2021-05-02 15:00:30,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:30,757 INFO L225 Difference]: With dead ends: 800 [2021-05-02 15:00:30,757 INFO L226 Difference]: Without dead ends: 798 [2021-05-02 15:00:30,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1851.5ms TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 15:00:30,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-05-02 15:00:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 749. [2021-05-02 15:00:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 530 states have (on average 1.288679245283019) internal successors, (683), 534 states have internal predecessors, (683), 167 states have call successors, (167), 52 states have call predecessors, (167), 51 states have return successors, (163), 162 states have call predecessors, (163), 163 states have call successors, (163) [2021-05-02 15:00:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1013 transitions. [2021-05-02 15:00:30,813 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1013 transitions. Word has length 70 [2021-05-02 15:00:30,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:30,813 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 1013 transitions. [2021-05-02 15:00:30,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:00:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1013 transitions. [2021-05-02 15:00:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 15:00:30,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:30,814 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 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] [2021-05-02 15:00:31,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 15:00:31,029 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:31,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:31,029 INFO L82 PathProgramCache]: Analyzing trace with hash -528746969, now seen corresponding path program 1 times [2021-05-02 15:00:31,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:31,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841325767] [2021-05-02 15:00:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:31,034 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:31,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554129891] [2021-05-02 15:00:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:31,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:00:31,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:31,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-02 15:00:31,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:31,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841325767] [2021-05-02 15:00:31,341 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:31,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554129891] [2021-05-02 15:00:31,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554129891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:31,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:31,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:00:31,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85250410] [2021-05-02 15:00:31,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:00:31,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:31,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:00:31,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:00:31,343 INFO L87 Difference]: Start difference. First operand 749 states and 1013 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:00:31,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:31,887 INFO L93 Difference]: Finished difference Result 1024 states and 1449 transitions. [2021-05-02 15:00:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 15:00:31,888 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 74 [2021-05-02 15:00:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:31,892 INFO L225 Difference]: With dead ends: 1024 [2021-05-02 15:00:31,893 INFO L226 Difference]: Without dead ends: 1022 [2021-05-02 15:00:31,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-05-02 15:00:31,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-05-02 15:00:31,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 779. [2021-05-02 15:00:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 545 states have (on average 1.2862385321100918) internal successors, (701), 552 states have internal predecessors, (701), 179 states have call successors, (179), 55 states have call predecessors, (179), 54 states have return successors, (175), 171 states have call predecessors, (175), 175 states have call successors, (175) [2021-05-02 15:00:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1055 transitions. [2021-05-02 15:00:31,954 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1055 transitions. Word has length 74 [2021-05-02 15:00:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:31,956 INFO L480 AbstractCegarLoop]: Abstraction has 779 states and 1055 transitions. [2021-05-02 15:00:31,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:00:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1055 transitions. [2021-05-02 15:00:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 15:00:31,957 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:31,957 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-02 15:00:32,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 15:00:32,173 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:32,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2070693174, now seen corresponding path program 2 times [2021-05-02 15:00:32,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:32,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965739069] [2021-05-02 15:00:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:32,178 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:32,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205946008] [2021-05-02 15:00:32,178 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:32,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:32,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:32,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:00:32,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:32,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 15:00:32,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:32,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965739069] [2021-05-02 15:00:32,434 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:32,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205946008] [2021-05-02 15:00:32,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205946008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:32,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:32,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:00:32,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388793782] [2021-05-02 15:00:32,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:00:32,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:32,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:00:32,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:00:32,436 INFO L87 Difference]: Start difference. First operand 779 states and 1055 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:00:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:32,781 INFO L93 Difference]: Finished difference Result 978 states and 1364 transitions. [2021-05-02 15:00:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 15:00:32,781 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 73 [2021-05-02 15:00:32,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:32,785 INFO L225 Difference]: With dead ends: 978 [2021-05-02 15:00:32,786 INFO L226 Difference]: Without dead ends: 976 [2021-05-02 15:00:32,786 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-05-02 15:00:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-05-02 15:00:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 897. [2021-05-02 15:00:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 621 states have (on average 1.317230273752013) internal successors, (818), 628 states have internal predecessors, (818), 219 states have call successors, (219), 57 states have call predecessors, (219), 56 states have return successors, (215), 211 states have call predecessors, (215), 215 states have call successors, (215) [2021-05-02 15:00:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1252 transitions. [2021-05-02 15:00:32,859 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1252 transitions. Word has length 73 [2021-05-02 15:00:32,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:32,859 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 1252 transitions. [2021-05-02 15:00:32,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:00:32,859 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1252 transitions. [2021-05-02 15:00:32,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 15:00:32,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:32,860 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 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, 1, 1] [2021-05-02 15:00:33,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:33,077 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:33,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:33,077 INFO L82 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 3 times [2021-05-02 15:00:33,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:33,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734135563] [2021-05-02 15:00:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:33,084 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:33,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974819670] [2021-05-02 15:00:33,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:33,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:00:33,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:33,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 15:00:33,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:33,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 36 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 15:00:33,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:33,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734135563] [2021-05-02 15:00:33,702 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:33,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974819670] [2021-05-02 15:00:33,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974819670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:33,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:33,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 15:00:33,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010321933] [2021-05-02 15:00:33,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 15:00:33,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:33,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 15:00:33,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-02 15:00:33,704 INFO L87 Difference]: Start difference. First operand 897 states and 1252 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:00:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:34,682 INFO L93 Difference]: Finished difference Result 979 states and 1364 transitions. [2021-05-02 15:00:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 15:00:34,683 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 75 [2021-05-02 15:00:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:34,687 INFO L225 Difference]: With dead ends: 979 [2021-05-02 15:00:34,687 INFO L226 Difference]: Without dead ends: 977 [2021-05-02 15:00:34,688 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 602.4ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-05-02 15:00:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-05-02 15:00:34,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 957. [2021-05-02 15:00:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 660 states have (on average 1.3212121212121213) internal successors, (872), 668 states have internal predecessors, (872), 236 states have call successors, (236), 61 states have call predecessors, (236), 60 states have return successors, (232), 227 states have call predecessors, (232), 232 states have call successors, (232) [2021-05-02 15:00:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1340 transitions. [2021-05-02 15:00:34,768 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1340 transitions. Word has length 75 [2021-05-02 15:00:34,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:34,768 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 1340 transitions. [2021-05-02 15:00:34,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:00:34,768 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1340 transitions. [2021-05-02 15:00:34,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 15:00:34,769 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:34,769 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:34,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:34,993 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash -949871629, now seen corresponding path program 3 times [2021-05-02 15:00:34,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:34,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171075460] [2021-05-02 15:00:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:34,999 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:34,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151497119] [2021-05-02 15:00:34,999 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:35,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 15:00:35,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:35,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:00:35,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:35,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:00:35,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:35,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171075460] [2021-05-02 15:00:35,262 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:35,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151497119] [2021-05-02 15:00:35,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151497119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:35,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:35,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:00:35,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961319563] [2021-05-02 15:00:35,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:00:35,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:35,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:00:35,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:00:35,263 INFO L87 Difference]: Start difference. First operand 957 states and 1340 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:00:35,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:35,613 INFO L93 Difference]: Finished difference Result 1736 states and 2484 transitions. [2021-05-02 15:00:35,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 15:00:35,614 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2021-05-02 15:00:35,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:35,620 INFO L225 Difference]: With dead ends: 1736 [2021-05-02 15:00:35,620 INFO L226 Difference]: Without dead ends: 1138 [2021-05-02 15:00:35,623 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-02 15:00:35,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-05-02 15:00:35,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1108. [2021-05-02 15:00:35,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 764 states have (on average 1.2905759162303665) internal successors, (986), 773 states have internal predecessors, (986), 268 states have call successors, (268), 76 states have call predecessors, (268), 75 states have return successors, (263), 258 states have call predecessors, (263), 263 states have call successors, (263) [2021-05-02 15:00:35,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1517 transitions. [2021-05-02 15:00:35,715 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1517 transitions. Word has length 76 [2021-05-02 15:00:35,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:35,715 INFO L480 AbstractCegarLoop]: Abstraction has 1108 states and 1517 transitions. [2021-05-02 15:00:35,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:00:35,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1517 transitions. [2021-05-02 15:00:35,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 15:00:35,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:35,716 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 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 15:00:35,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:35,933 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:35,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:35,933 INFO L82 PathProgramCache]: Analyzing trace with hash -362795852, now seen corresponding path program 1 times [2021-05-02 15:00:35,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:35,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350433663] [2021-05-02 15:00:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:35,941 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:35,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200635090] [2021-05-02 15:00:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:36,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 15:00:36,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:36,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 15:00:36,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:36,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350433663] [2021-05-02 15:00:36,438 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:36,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200635090] [2021-05-02 15:00:36,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200635090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:36,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:36,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 15:00:36,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248443428] [2021-05-02 15:00:36,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 15:00:36,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 15:00:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:00:36,439 INFO L87 Difference]: Start difference. First operand 1108 states and 1517 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:37,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:37,217 INFO L93 Difference]: Finished difference Result 1180 states and 1616 transitions. [2021-05-02 15:00:37,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 15:00:37,218 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 81 [2021-05-02 15:00:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:37,223 INFO L225 Difference]: With dead ends: 1180 [2021-05-02 15:00:37,223 INFO L226 Difference]: Without dead ends: 1177 [2021-05-02 15:00:37,224 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-02 15:00:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-05-02 15:00:37,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1162. [2021-05-02 15:00:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 798 states have (on average 1.2907268170426065) internal successors, (1030), 805 states have internal predecessors, (1030), 283 states have call successors, (283), 81 states have call predecessors, (283), 80 states have return successors, (279), 275 states have call predecessors, (279), 279 states have call successors, (279) [2021-05-02 15:00:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1592 transitions. [2021-05-02 15:00:37,319 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1592 transitions. Word has length 81 [2021-05-02 15:00:37,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:37,319 INFO L480 AbstractCegarLoop]: Abstraction has 1162 states and 1592 transitions. [2021-05-02 15:00:37,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:37,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1592 transitions. [2021-05-02 15:00:37,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 15:00:37,320 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:37,320 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 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] [2021-05-02 15:00:37,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 15:00:37,541 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:37,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:37,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2112645673, now seen corresponding path program 1 times [2021-05-02 15:00:37,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:37,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704577571] [2021-05-02 15:00:37,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:37,548 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:37,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573877096] [2021-05-02 15:00:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:37,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:00:37,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:37,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 15:00:37,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:37,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704577571] [2021-05-02 15:00:37,792 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:37,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573877096] [2021-05-02 15:00:37,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573877096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:37,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:37,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:00:37,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322474270] [2021-05-02 15:00:37,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:00:37,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:37,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:00:37,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:00:37,794 INFO L87 Difference]: Start difference. First operand 1162 states and 1592 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:38,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:38,044 INFO L93 Difference]: Finished difference Result 1175 states and 1601 transitions. [2021-05-02 15:00:38,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 15:00:38,045 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-02 15:00:38,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:38,050 INFO L225 Difference]: With dead ends: 1175 [2021-05-02 15:00:38,050 INFO L226 Difference]: Without dead ends: 1168 [2021-05-02 15:00:38,050 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:00:38,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-05-02 15:00:38,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1162. [2021-05-02 15:00:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 798 states have (on average 1.2882205513784462) internal successors, (1028), 805 states have internal predecessors, (1028), 283 states have call successors, (283), 81 states have call predecessors, (283), 80 states have return successors, (279), 275 states have call predecessors, (279), 279 states have call successors, (279) [2021-05-02 15:00:38,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1590 transitions. [2021-05-02 15:00:38,141 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1590 transitions. Word has length 87 [2021-05-02 15:00:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:38,141 INFO L480 AbstractCegarLoop]: Abstraction has 1162 states and 1590 transitions. [2021-05-02 15:00:38,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:38,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1590 transitions. [2021-05-02 15:00:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 15:00:38,142 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:38,142 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 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] [2021-05-02 15:00:38,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:38,343 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:38,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:38,343 INFO L82 PathProgramCache]: Analyzing trace with hash -790944287, now seen corresponding path program 2 times [2021-05-02 15:00:38,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:38,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896238889] [2021-05-02 15:00:38,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:38,348 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:38,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435382977] [2021-05-02 15:00:38,348 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:38,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:38,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:38,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 15:00:38,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:38,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-02 15:00:38,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:38,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896238889] [2021-05-02 15:00:38,624 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:38,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435382977] [2021-05-02 15:00:38,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435382977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:38,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:38,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:00:38,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518211626] [2021-05-02 15:00:38,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:00:38,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:38,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:00:38,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:00:38,626 INFO L87 Difference]: Start difference. First operand 1162 states and 1590 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 15:00:38,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:38,924 INFO L93 Difference]: Finished difference Result 1203 states and 1644 transitions. [2021-05-02 15:00:38,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:00:38,933 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 90 [2021-05-02 15:00:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:38,938 INFO L225 Difference]: With dead ends: 1203 [2021-05-02 15:00:38,938 INFO L226 Difference]: Without dead ends: 1201 [2021-05-02 15:00:38,939 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:00:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-05-02 15:00:39,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1177. [2021-05-02 15:00:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 807 states have (on average 1.2862453531598512) internal successors, (1038), 814 states have internal predecessors, (1038), 287 states have call successors, (287), 83 states have call predecessors, (287), 82 states have return successors, (283), 279 states have call predecessors, (283), 283 states have call successors, (283) [2021-05-02 15:00:39,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1608 transitions. [2021-05-02 15:00:39,033 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1608 transitions. Word has length 90 [2021-05-02 15:00:39,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:39,033 INFO L480 AbstractCegarLoop]: Abstraction has 1177 states and 1608 transitions. [2021-05-02 15:00:39,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 15:00:39,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1608 transitions. [2021-05-02 15:00:39,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 15:00:39,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:39,035 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 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] [2021-05-02 15:00:39,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 15:00:39,249 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:39,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:39,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 2 times [2021-05-02 15:00:39,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:39,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467674290] [2021-05-02 15:00:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:39,253 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:39,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869195408] [2021-05-02 15:00:39,253 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:39,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:39,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:39,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 101 conjunts are in the unsatisfiable core [2021-05-02 15:00:39,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:39,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:40,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:40,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:40,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:40,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:40,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:40,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 51 proven. 42 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-05-02 15:00:40,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:40,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467674290] [2021-05-02 15:00:40,165 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:40,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869195408] [2021-05-02 15:00:40,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869195408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:40,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:40,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 15:00:40,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812938328] [2021-05-02 15:00:40,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 15:00:40,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:40,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 15:00:40,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-02 15:00:40,167 INFO L87 Difference]: Start difference. First operand 1177 states and 1608 transitions. Second operand has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 15:00:41,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:41,511 INFO L93 Difference]: Finished difference Result 1267 states and 1736 transitions. [2021-05-02 15:00:41,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 15:00:41,512 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 88 [2021-05-02 15:00:41,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:41,517 INFO L225 Difference]: With dead ends: 1267 [2021-05-02 15:00:41,517 INFO L226 Difference]: Without dead ends: 1264 [2021-05-02 15:00:41,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 836.7ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-05-02 15:00:41,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-05-02 15:00:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1243. [2021-05-02 15:00:41,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 845 states have (on average 1.2899408284023668) internal successors, (1090), 853 states have internal predecessors, (1090), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 15:00:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1708 transitions. [2021-05-02 15:00:41,632 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1708 transitions. Word has length 88 [2021-05-02 15:00:41,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:41,633 INFO L480 AbstractCegarLoop]: Abstraction has 1243 states and 1708 transitions. [2021-05-02 15:00:41,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 15:00:41,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1708 transitions. [2021-05-02 15:00:41,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 15:00:41,635 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:41,635 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 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] [2021-05-02 15:00:41,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:41,858 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:41,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:41,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1791236545, now seen corresponding path program 2 times [2021-05-02 15:00:41,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:41,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867822651] [2021-05-02 15:00:41,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:41,866 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:41,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884012432] [2021-05-02 15:00:41,866 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:41,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:41,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:41,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:00:41,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:41,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:41,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:41,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:41,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:41,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:41,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:41,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:41,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:41,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:41,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:41,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:41,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 15:00:42,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:42,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867822651] [2021-05-02 15:00:42,141 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:42,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884012432] [2021-05-02 15:00:42,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884012432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:42,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:42,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:00:42,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004790072] [2021-05-02 15:00:42,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:00:42,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:42,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:00:42,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:00:42,142 INFO L87 Difference]: Start difference. First operand 1243 states and 1708 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:42,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:42,456 INFO L93 Difference]: Finished difference Result 1280 states and 1744 transitions. [2021-05-02 15:00:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 15:00:42,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2021-05-02 15:00:42,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:42,461 INFO L225 Difference]: With dead ends: 1280 [2021-05-02 15:00:42,461 INFO L226 Difference]: Without dead ends: 1273 [2021-05-02 15:00:42,462 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-02 15:00:42,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-05-02 15:00:42,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1254. [2021-05-02 15:00:42,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 856 states have (on average 1.286214953271028) internal successors, (1101), 864 states have internal predecessors, (1101), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 15:00:42,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1719 transitions. [2021-05-02 15:00:42,559 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1719 transitions. Word has length 91 [2021-05-02 15:00:42,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:42,559 INFO L480 AbstractCegarLoop]: Abstraction has 1254 states and 1719 transitions. [2021-05-02 15:00:42,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:42,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1719 transitions. [2021-05-02 15:00:42,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 15:00:42,561 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:42,561 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 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] [2021-05-02 15:00:42,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 15:00:42,781 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:42,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:42,781 INFO L82 PathProgramCache]: Analyzing trace with hash -554609469, now seen corresponding path program 1 times [2021-05-02 15:00:42,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:42,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898358739] [2021-05-02 15:00:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:42,789 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:42,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512534564] [2021-05-02 15:00:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:42,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:00:42,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:42,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:42,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 15:00:43,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:43,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898358739] [2021-05-02 15:00:43,081 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:43,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512534564] [2021-05-02 15:00:43,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512534564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:43,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:43,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:00:43,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025549053] [2021-05-02 15:00:43,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:00:43,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:43,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:00:43,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:00:43,083 INFO L87 Difference]: Start difference. First operand 1254 states and 1719 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:43,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:43,405 INFO L93 Difference]: Finished difference Result 1568 states and 2190 transitions. [2021-05-02 15:00:43,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 15:00:43,406 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2021-05-02 15:00:43,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:43,411 INFO L225 Difference]: With dead ends: 1568 [2021-05-02 15:00:43,412 INFO L226 Difference]: Without dead ends: 1280 [2021-05-02 15:00:43,413 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-02 15:00:43,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-05-02 15:00:43,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1274. [2021-05-02 15:00:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 876 states have (on average 1.278538812785388) internal successors, (1120), 884 states have internal predecessors, (1120), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 15:00:43,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1738 transitions. [2021-05-02 15:00:43,525 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1738 transitions. Word has length 93 [2021-05-02 15:00:43,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:43,525 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 1738 transitions. [2021-05-02 15:00:43,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:43,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1738 transitions. [2021-05-02 15:00:43,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 15:00:43,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:43,527 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:43,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 15:00:43,741 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:43,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:43,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1287129886, now seen corresponding path program 2 times [2021-05-02 15:00:43,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:43,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349890145] [2021-05-02 15:00:43,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:43,746 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:43,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892383780] [2021-05-02 15:00:43,747 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:43,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:43,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:43,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 15:00:43,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:43,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:44,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:44,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:44,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:44,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:44,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:44,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:44,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:44,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-05-02 15:00:44,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:44,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349890145] [2021-05-02 15:00:44,077 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:44,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892383780] [2021-05-02 15:00:44,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892383780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:44,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:44,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:00:44,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179000019] [2021-05-02 15:00:44,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:00:44,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:44,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:00:44,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:44,079 INFO L87 Difference]: Start difference. First operand 1274 states and 1738 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 15:00:44,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:44,852 INFO L93 Difference]: Finished difference Result 1571 states and 2215 transitions. [2021-05-02 15:00:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 15:00:44,852 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 97 [2021-05-02 15:00:44,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:44,859 INFO L225 Difference]: With dead ends: 1571 [2021-05-02 15:00:44,859 INFO L226 Difference]: Without dead ends: 1569 [2021-05-02 15:00:44,860 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 15:00:44,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-05-02 15:00:44,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1310. [2021-05-02 15:00:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 894 states have (on average 1.2818791946308725) internal successors, (1146), 902 states have internal predecessors, (1146), 327 states have call successors, (327), 89 states have call predecessors, (327), 88 states have return successors, (323), 318 states have call predecessors, (323), 323 states have call successors, (323) [2021-05-02 15:00:44,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1796 transitions. [2021-05-02 15:00:44,972 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1796 transitions. Word has length 97 [2021-05-02 15:00:44,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:44,972 INFO L480 AbstractCegarLoop]: Abstraction has 1310 states and 1796 transitions. [2021-05-02 15:00:44,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 15:00:44,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1796 transitions. [2021-05-02 15:00:44,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 15:00:44,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:44,974 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 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] [2021-05-02 15:00:45,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:45,198 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:45,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:45,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2034142563, now seen corresponding path program 3 times [2021-05-02 15:00:45,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:45,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611358019] [2021-05-02 15:00:45,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:45,219 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:45,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987200060] [2021-05-02 15:00:45,219 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:45,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 15:00:45,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:45,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:00:45,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:45,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 15:00:45,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:45,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611358019] [2021-05-02 15:00:45,514 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:45,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987200060] [2021-05-02 15:00:45,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987200060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:45,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:45,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:00:45,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775297182] [2021-05-02 15:00:45,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:00:45,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:45,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:00:45,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:45,516 INFO L87 Difference]: Start difference. First operand 1310 states and 1796 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:45,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:45,888 INFO L93 Difference]: Finished difference Result 1873 states and 2591 transitions. [2021-05-02 15:00:45,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 15:00:45,889 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2021-05-02 15:00:45,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:45,895 INFO L225 Difference]: With dead ends: 1873 [2021-05-02 15:00:45,895 INFO L226 Difference]: Without dead ends: 1524 [2021-05-02 15:00:45,897 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-02 15:00:45,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-05-02 15:00:46,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1466. [2021-05-02 15:00:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 986 states have (on average 1.268762677484787) internal successors, (1251), 995 states have internal predecessors, (1251), 368 states have call successors, (368), 112 states have call predecessors, (368), 111 states have return successors, (363), 358 states have call predecessors, (363), 363 states have call successors, (363) [2021-05-02 15:00:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 1982 transitions. [2021-05-02 15:00:46,019 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 1982 transitions. Word has length 97 [2021-05-02 15:00:46,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:46,019 INFO L480 AbstractCegarLoop]: Abstraction has 1466 states and 1982 transitions. [2021-05-02 15:00:46,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:46,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 1982 transitions. [2021-05-02 15:00:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 15:00:46,021 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:46,021 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 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] [2021-05-02 15:00:46,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:46,237 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:46,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:46,237 INFO L82 PathProgramCache]: Analyzing trace with hash 516983514, now seen corresponding path program 4 times [2021-05-02 15:00:46,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:46,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914624921] [2021-05-02 15:00:46,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:46,244 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:46,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414196986] [2021-05-02 15:00:46,244 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:46,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 15:00:46,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:46,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 15:00:46,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:46,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:46,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:47,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:47,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 33 proven. 61 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 15:00:47,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:47,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914624921] [2021-05-02 15:00:47,172 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:47,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414196986] [2021-05-02 15:00:47,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414196986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:47,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:47,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 15:00:47,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584419608] [2021-05-02 15:00:47,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 15:00:47,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:47,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 15:00:47,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-02 15:00:47,174 INFO L87 Difference]: Start difference. First operand 1466 states and 1982 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 15:00:47,894 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-02 15:00:48,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:48,663 INFO L93 Difference]: Finished difference Result 1531 states and 2077 transitions. [2021-05-02 15:00:48,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 15:00:48,663 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 97 [2021-05-02 15:00:48,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:48,677 INFO L225 Difference]: With dead ends: 1531 [2021-05-02 15:00:48,678 INFO L226 Difference]: Without dead ends: 1529 [2021-05-02 15:00:48,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1001.0ms TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-05-02 15:00:48,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2021-05-02 15:00:48,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1507. [2021-05-02 15:00:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1010 states have (on average 1.2742574257425743) internal successors, (1287), 1019 states have internal predecessors, (1287), 384 states have call successors, (384), 113 states have call predecessors, (384), 112 states have return successors, (379), 374 states have call predecessors, (379), 379 states have call successors, (379) [2021-05-02 15:00:48,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2050 transitions. [2021-05-02 15:00:48,787 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2050 transitions. Word has length 97 [2021-05-02 15:00:48,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:48,787 INFO L480 AbstractCegarLoop]: Abstraction has 1507 states and 2050 transitions. [2021-05-02 15:00:48,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 15:00:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2050 transitions. [2021-05-02 15:00:48,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 15:00:48,789 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:48,789 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 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] [2021-05-02 15:00:49,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:49,005 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:49,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:49,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1787026468, now seen corresponding path program 3 times [2021-05-02 15:00:49,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:49,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945540324] [2021-05-02 15:00:49,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:49,013 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:49,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365062563] [2021-05-02 15:00:49,013 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:49,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 15:00:49,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:49,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 15:00:49,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:49,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 120 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 15:00:49,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:49,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945540324] [2021-05-02 15:00:49,339 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:49,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365062563] [2021-05-02 15:00:49,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365062563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:49,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:49,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:00:49,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477463384] [2021-05-02 15:00:49,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:00:49,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:00:49,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:00:49,341 INFO L87 Difference]: Start difference. First operand 1507 states and 2050 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:49,803 INFO L93 Difference]: Finished difference Result 1843 states and 2466 transitions. [2021-05-02 15:00:49,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 15:00:49,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 98 [2021-05-02 15:00:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:49,819 INFO L225 Difference]: With dead ends: 1843 [2021-05-02 15:00:49,819 INFO L226 Difference]: Without dead ends: 1836 [2021-05-02 15:00:49,820 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-05-02 15:00:49,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2021-05-02 15:00:49,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1737. [2021-05-02 15:00:49,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1161 states have (on average 1.2609819121447028) internal successors, (1464), 1186 states have internal predecessors, (1464), 442 states have call successors, (442), 134 states have call predecessors, (442), 133 states have return successors, (436), 416 states have call predecessors, (436), 436 states have call successors, (436) [2021-05-02 15:00:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2342 transitions. [2021-05-02 15:00:49,967 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2342 transitions. Word has length 98 [2021-05-02 15:00:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:49,967 INFO L480 AbstractCegarLoop]: Abstraction has 1737 states and 2342 transitions. [2021-05-02 15:00:49,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2342 transitions. [2021-05-02 15:00:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 15:00:49,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:49,968 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 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] [2021-05-02 15:00:50,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 15:00:50,185 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:50,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:50,185 INFO L82 PathProgramCache]: Analyzing trace with hash 971780744, now seen corresponding path program 1 times [2021-05-02 15:00:50,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:50,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711403635] [2021-05-02 15:00:50,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:50,192 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:50,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557192628] [2021-05-02 15:00:50,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:50,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 15:00:50,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:50,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 31 proven. 25 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-05-02 15:00:50,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:50,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711403635] [2021-05-02 15:00:50,553 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:50,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557192628] [2021-05-02 15:00:50,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557192628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:50,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:50,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:00:50,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914703092] [2021-05-02 15:00:50,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:00:50,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:50,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:00:50,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:00:50,555 INFO L87 Difference]: Start difference. First operand 1737 states and 2342 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 15:00:51,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:51,206 INFO L93 Difference]: Finished difference Result 2047 states and 2823 transitions. [2021-05-02 15:00:51,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 15:00:51,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 101 [2021-05-02 15:00:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:51,215 INFO L225 Difference]: With dead ends: 2047 [2021-05-02 15:00:51,215 INFO L226 Difference]: Without dead ends: 2045 [2021-05-02 15:00:51,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 346.1ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-05-02 15:00:51,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-05-02 15:00:51,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1881. [2021-05-02 15:00:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1224 states have (on average 1.2679738562091503) internal successors, (1552), 1266 states have internal predecessors, (1552), 518 states have call successors, (518), 139 states have call predecessors, (518), 138 states have return successors, (512), 475 states have call predecessors, (512), 512 states have call successors, (512) [2021-05-02 15:00:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2582 transitions. [2021-05-02 15:00:51,351 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2582 transitions. Word has length 101 [2021-05-02 15:00:51,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:51,351 INFO L480 AbstractCegarLoop]: Abstraction has 1881 states and 2582 transitions. [2021-05-02 15:00:51,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 15:00:51,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2582 transitions. [2021-05-02 15:00:51,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 15:00:51,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:51,353 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 3, 2, 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] [2021-05-02 15:00:51,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:51,574 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:51,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:51,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1348351390, now seen corresponding path program 1 times [2021-05-02 15:00:51,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:51,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469488681] [2021-05-02 15:00:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:51,581 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:51,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620752973] [2021-05-02 15:00:51,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:51,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:00:51,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:51,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 103 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 15:00:51,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:51,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469488681] [2021-05-02 15:00:51,916 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:51,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620752973] [2021-05-02 15:00:51,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620752973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:51,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:51,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:00:51,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912022148] [2021-05-02 15:00:51,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:00:51,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:51,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:00:51,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:51,918 INFO L87 Difference]: Start difference. First operand 1881 states and 2582 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:52,317 INFO L93 Difference]: Finished difference Result 2680 states and 3826 transitions. [2021-05-02 15:00:52,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 15:00:52,318 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 99 [2021-05-02 15:00:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:52,324 INFO L225 Difference]: With dead ends: 2680 [2021-05-02 15:00:52,324 INFO L226 Difference]: Without dead ends: 1891 [2021-05-02 15:00:52,328 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-02 15:00:52,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-05-02 15:00:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1877. [2021-05-02 15:00:52,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1220 states have (on average 1.2532786885245901) internal successors, (1529), 1262 states have internal predecessors, (1529), 518 states have call successors, (518), 139 states have call predecessors, (518), 138 states have return successors, (512), 475 states have call predecessors, (512), 512 states have call successors, (512) [2021-05-02 15:00:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 2559 transitions. [2021-05-02 15:00:52,481 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 2559 transitions. Word has length 99 [2021-05-02 15:00:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:52,481 INFO L480 AbstractCegarLoop]: Abstraction has 1877 states and 2559 transitions. [2021-05-02 15:00:52,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:52,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 2559 transitions. [2021-05-02 15:00:52,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 15:00:52,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:52,483 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 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, 1] [2021-05-02 15:00:52,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:52,699 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:52,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:52,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1350164207, now seen corresponding path program 3 times [2021-05-02 15:00:52,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:52,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212176038] [2021-05-02 15:00:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:52,705 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:52,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146711257] [2021-05-02 15:00:52,705 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:52,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 15:00:52,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:52,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 15:00:52,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:52,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-05-02 15:00:53,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:53,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212176038] [2021-05-02 15:00:53,478 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:53,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146711257] [2021-05-02 15:00:53,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146711257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:53,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:53,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:00:53,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898284550] [2021-05-02 15:00:53,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 15:00:53,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:53,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 15:00:53,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:00:53,480 INFO L87 Difference]: Start difference. First operand 1877 states and 2559 transitions. Second operand has 15 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:57,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:57,064 INFO L93 Difference]: Finished difference Result 2071 states and 2857 transitions. [2021-05-02 15:00:57,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 15:00:57,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 104 [2021-05-02 15:00:57,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:57,065 INFO L225 Difference]: With dead ends: 2071 [2021-05-02 15:00:57,065 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:00:57,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 587.6ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-05-02 15:00:57,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:00:57,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:00:57,072 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 15:00:57,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:00:57,072 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 104 [2021-05-02 15:00:57,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:57,073 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:00:57,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:57,073 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:00:57,073 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:00:57,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 15:00:57,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:00:58,668 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 726 DAG size of output: 220 [2021-05-02 15:00:59,236 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 82 [2021-05-02 15:01:00,039 WARN L205 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 715 DAG size of output: 271 [2021-05-02 15:01:00,398 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 82 [2021-05-02 15:01:00,716 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 82 [2021-05-02 15:01:01,620 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 568 DAG size of output: 106 [2021-05-02 15:01:02,271 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 15 [2021-05-02 15:01:03,161 WARN L205 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 11 [2021-05-02 15:01:03,273 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 15 [2021-05-02 15:01:03,376 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 15 [2021-05-02 15:01:03,596 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 15 [2021-05-02 15:01:03,625 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-02 15:01:03,625 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-02 15:01:03,625 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-02 15:01:03,625 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:01:03,626 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 15:01:03,626 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:01:03,626 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:01:03,626 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2021-05-02 15:01:03,626 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:01:03,626 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:01:03,626 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-02 15:01:03,626 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-02 15:01:03,626 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-02 15:01:03,626 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-02 15:01:03,626 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 19 75) no Hoare annotation was computed. [2021-05-02 15:01:03,626 INFO L198 CegarLoopUtils]: For program point L52(lines 48 58) no Hoare annotation was computed. [2021-05-02 15:01:03,626 INFO L198 CegarLoopUtils]: For program point L48-1(lines 48 58) no Hoare annotation was computed. [2021-05-02 15:01:03,626 INFO L194 CegarLoopUtils]: At program point L48-3(lines 48 58) the Hoare annotation is: (or (and (<= 1 main_~x~0) (<= 1 main_~y~0) (<= main_~v~0 main_~c~0)) (not (<= |old(~counter~0)| 0))) [2021-05-02 15:01:03,626 INFO L198 CegarLoopUtils]: For program point L48-4(lines 48 58) no Hoare annotation was computed. [2021-05-02 15:01:03,626 INFO L198 CegarLoopUtils]: For program point L73(line 73) no Hoare annotation was computed. [2021-05-02 15:01:03,627 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 15:01:03,627 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (= ~counter~0 |old(~counter~0)|))) [2021-05-02 15:01:03,627 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (or (and (<= 1 main_~x~0) (<= 1 main_~y~0) (<= main_~v~0 main_~c~0)) (not (<= |old(~counter~0)| 0))) [2021-05-02 15:01:03,627 INFO L194 CegarLoopUtils]: At program point L49-1(line 49) the Hoare annotation is: (or (and (<= 1 main_~x~0) (<= 1 main_~y~0) (<= main_~v~0 main_~c~0)) (not (<= |old(~counter~0)| 0))) [2021-05-02 15:01:03,627 INFO L198 CegarLoopUtils]: For program point L41-1(lines 41 61) no Hoare annotation was computed. [2021-05-02 15:01:03,627 INFO L194 CegarLoopUtils]: At program point L41-3(lines 41 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (<= 1 main_~y~0))) [2021-05-02 15:01:03,627 INFO L198 CegarLoopUtils]: For program point L41-4(lines 41 61) no Hoare annotation was computed. [2021-05-02 15:01:03,627 INFO L198 CegarLoopUtils]: For program point L25(line 25) no Hoare annotation was computed. [2021-05-02 15:01:03,627 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (or (and (<= 1 main_~x~0) (<= 1 main_~y~0) (<= main_~v~0 main_~c~0)) (not (<= |old(~counter~0)| 0))) [2021-05-02 15:01:03,627 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 19 75) no Hoare annotation was computed. [2021-05-02 15:01:03,627 INFO L198 CegarLoopUtils]: For program point L42(lines 42 43) no Hoare annotation was computed. [2021-05-02 15:01:03,627 INFO L198 CegarLoopUtils]: For program point L34-1(lines 34 72) no Hoare annotation was computed. [2021-05-02 15:01:03,627 INFO L194 CegarLoopUtils]: At program point L34-3(lines 34 72) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (<= 1 main_~y~0))) [2021-05-02 15:01:03,627 INFO L194 CegarLoopUtils]: At program point L34-4(lines 34 72) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (<= 1 main_~y~0))) [2021-05-02 15:01:03,627 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 19 75) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 15:01:03,627 INFO L194 CegarLoopUtils]: At program point L51(line 51) the Hoare annotation is: (or (and (<= 1 main_~x~0) (<= 1 main_~y~0) (<= main_~v~0 main_~c~0)) (not (<= |old(~counter~0)| 0))) [2021-05-02 15:01:03,627 INFO L198 CegarLoopUtils]: For program point L35(lines 35 36) no Hoare annotation was computed. [2021-05-02 15:01:03,628 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-02 15:01:03,628 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-02 15:01:03,628 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-02 15:01:03,628 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-02 15:01:03,628 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-02 15:01:03,628 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-02 15:01:03,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:01:03 BoogieIcfgContainer [2021-05-02 15:01:03,645 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:01:03,646 INFO L168 Benchmark]: Toolchain (without parser) took 53702.45 ms. Allocated memory was 182.5 MB in the beginning and 664.8 MB in the end (delta: 482.3 MB). Free memory was 147.0 MB in the beginning and 348.6 MB in the end (delta: -201.6 MB). Peak memory consumption was 387.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:03,646 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 182.5 MB. Free memory is still 163.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:01:03,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.88 ms. Allocated memory is still 182.5 MB. Free memory was 146.9 MB in the beginning and 165.8 MB in the end (delta: -18.9 MB). Peak memory consumption was 11.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:03,646 INFO L168 Benchmark]: Boogie Preprocessor took 38.33 ms. Allocated memory is still 182.5 MB. Free memory was 165.8 MB in the beginning and 164.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:03,646 INFO L168 Benchmark]: RCFGBuilder took 371.06 ms. Allocated memory is still 182.5 MB. Free memory was 163.7 MB in the beginning and 145.9 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:03,647 INFO L168 Benchmark]: TraceAbstraction took 52960.54 ms. Allocated memory was 182.5 MB in the beginning and 664.8 MB in the end (delta: 482.3 MB). Free memory was 145.3 MB in the beginning and 348.6 MB in the end (delta: -203.3 MB). Peak memory consumption was 385.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:03,648 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 182.5 MB. Free memory is still 163.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 325.88 ms. Allocated memory is still 182.5 MB. Free memory was 146.9 MB in the beginning and 165.8 MB in the end (delta: -18.9 MB). Peak memory consumption was 11.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.33 ms. Allocated memory is still 182.5 MB. Free memory was 165.8 MB in the beginning and 164.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 371.06 ms. Allocated memory is still 182.5 MB. Free memory was 163.7 MB in the beginning and 145.9 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 52960.54 ms. Allocated memory was 182.5 MB in the beginning and 664.8 MB in the end (delta: 482.3 MB). Free memory was 145.3 MB in the beginning and 348.6 MB in the end (delta: -203.3 MB). Peak memory consumption was 385.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 46564.9ms, OverallIterations: 45, TraceHistogramMax: 13, EmptinessCheckTime: 61.4ms, AutomataDifference: 20426.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 6329.1ms, InitialAbstractionConstructionTime: 10.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2783 SDtfs, 4129 SDslu, 13816 SDs, 0 SdLazy, 10551 SolverSat, 2405 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 10221.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3047 GetRequests, 2371 SyntacticMatches, 5 SemanticMatches, 671 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 9198.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1881occurred in iteration=43, InterpolantAutomatonStates: 624, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2354.4ms AutomataMinimizationTime, 45 MinimizatonAttempts, 1825 StatesRemovedByMinimization, 41 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 16 LocationsWithAnnotation, 1584 PreInvPairs, 2451 NumberOfFragments, 179 HoareAnnotationTreeSize, 1584 FomulaSimplifications, 29499362 FormulaSimplificationTreeSizeReduction, 4343.4ms HoareSimplificationTime, 16 FomulaSimplificationsInter, 53058 FormulaSimplificationTreeSizeReductionInter, 1931.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 503.3ms SsaConstructionTime, 1483.2ms SatisfiabilityAnalysisTime, 10466.6ms InterpolantComputationTime, 2802 NumberOfCodeBlocks, 2661 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 2757 ConstructedInterpolants, 0 QuantifiedInterpolants, 14440 SizeOfPredicates, 279 NumberOfNonLiveVariables, 10359 ConjunctsInSsa, 1093 ConjunctsInUnsatCore, 45 InterpolantComputations, 9 PerfectInterpolantSequences, 2753/3873 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: 41]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || (1 <= x && 1 <= y) - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: ((1 <= x && 1 <= y) && v <= c) || !(\old(counter) <= 0) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || (1 <= x && 1 <= y) RESULT: Ultimate proved your program to be correct! Received shutdown request...