/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 05:26:55,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 05:26:55,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 05:26:55,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 05:26:55,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 05:26:55,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 05:26:56,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 05:26:56,004 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 05:26:56,012 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 05:26:56,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 05:26:56,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 05:26:56,014 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 05:26:56,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 05:26:56,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 05:26:56,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 05:26:56,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 05:26:56,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 05:26:56,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 05:26:56,014 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 05:26:56,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 05:26:56,014 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 05:26:56,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 05:26:56,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 05:26:56,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 05:26:56,015 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 05:26:56,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 05:26:56,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 05:26:56,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 05:26:56,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 05:26:56,015 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 05:26:56,015 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 05:26:56,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 05:26:56,016 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 05:26:56,016 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 05:26:56,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 05:26:56,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 05:26:56,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 05:26:56,225 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 05:26:56,225 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 05:26:56,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c [2022-03-19 05:26:56,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b27d6e7d4/e0777dae42f147948700575a7e7f96aa/FLAG8a41b3b81 [2022-03-19 05:26:56,661 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 05:26:56,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c [2022-03-19 05:26:56,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b27d6e7d4/e0777dae42f147948700575a7e7f96aa/FLAG8a41b3b81 [2022-03-19 05:26:56,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b27d6e7d4/e0777dae42f147948700575a7e7f96aa [2022-03-19 05:26:56,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 05:26:56,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 05:26:56,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 05:26:56,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 05:26:56,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 05:26:56,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 05:26:56" (1/1) ... [2022-03-19 05:26:56,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6708b362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:26:56, skipping insertion in model container [2022-03-19 05:26:56,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 05:26:56" (1/1) ... [2022-03-19 05:26:56,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 05:26:56,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 05:26:56,868 WARN L230 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/hard2_valuebound2.c[526,539] [2022-03-19 05:26:56,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 05:26:56,897 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 05:26:56,906 WARN L230 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/hard2_valuebound2.c[526,539] [2022-03-19 05:26:56,918 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 05:26:56,927 INFO L208 MainTranslator]: Completed translation [2022-03-19 05:26:56,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:26:56 WrapperNode [2022-03-19 05:26:56,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 05:26:56,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 05:26:56,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 05:26:56,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 05:26:56,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:26:56" (1/1) ... [2022-03-19 05:26:56,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:26:56" (1/1) ... [2022-03-19 05:26:56,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:26:56" (1/1) ... [2022-03-19 05:26:56,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:26:56" (1/1) ... [2022-03-19 05:26:56,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:26:56" (1/1) ... [2022-03-19 05:26:56,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:26:56" (1/1) ... [2022-03-19 05:26:56,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:26:56" (1/1) ... [2022-03-19 05:26:56,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 05:26:56,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 05:26:56,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 05:26:56,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 05:26:56,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:26:56" (1/1) ... [2022-03-19 05:26:56,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 05:26:56,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:26:57,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 05:26:57,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 05:26:57,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 05:26:57,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 05:26:57,099 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 05:26:57,099 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 05:26:57,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 05:26:57,099 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 05:26:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 05:26:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 05:26:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 05:26:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 05:26:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 05:26:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 05:26:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 05:26:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 05:26:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 05:26:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 05:26:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 05:26:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 05:26:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 05:26:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 05:26:57,149 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 05:26:57,150 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 05:26:57,272 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 05:26:57,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 05:26:57,276 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 05:26:57,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 05:26:57 BoogieIcfgContainer [2022-03-19 05:26:57,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 05:26:57,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 05:26:57,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 05:26:57,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 05:26:57,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 05:26:56" (1/3) ... [2022-03-19 05:26:57,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e1bd22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 05:26:57, skipping insertion in model container [2022-03-19 05:26:57,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:26:56" (2/3) ... [2022-03-19 05:26:57,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e1bd22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 05:26:57, skipping insertion in model container [2022-03-19 05:26:57,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 05:26:57" (3/3) ... [2022-03-19 05:26:57,304 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound2.c [2022-03-19 05:26:57,307 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 05:26:57,307 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 05:26:57,356 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 05:26:57,360 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 05:26:57,360 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 05:26:57,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 05:26:57,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 05:26:57,380 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:26:57,380 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:26:57,381 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:26:57,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:26:57,387 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2022-03-19 05:26:57,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:26:57,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [899480624] [2022-03-19 05:26:57,402 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:26:57,403 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 2 times [2022-03-19 05:26:57,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:26:57,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880713487] [2022-03-19 05:26:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:26:57,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:26:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:26:57,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 05:26:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:26:57,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 05:26:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:26:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 05:26:57,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:26:57,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880713487] [2022-03-19 05:26:57,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880713487] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:26:57,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:26:57,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 05:26:57,558 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:26:57,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [899480624] [2022-03-19 05:26:57,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [899480624] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:26:57,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:26:57,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 05:26:57,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662416567] [2022-03-19 05:26:57,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:26:57,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 05:26:57,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:26:57,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 05:26:57,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 05:26:57,586 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 05:26:57,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:26:57,663 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2022-03-19 05:26:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 05:26:57,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-19 05:26:57,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:26:57,670 INFO L225 Difference]: With dead ends: 61 [2022-03-19 05:26:57,670 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 05:26:57,673 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 05:26:57,676 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:26:57,677 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:26:57,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 05:26:57,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-19 05:26:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 05:26:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-03-19 05:26:57,714 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-03-19 05:26:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:26:57,714 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-03-19 05:26:57,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 05:26:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-03-19 05:26:57,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 05:26:57,715 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:26:57,715 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:26:57,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 05:26:57,716 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:26:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:26:57,717 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2022-03-19 05:26:57,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:26:57,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1817661376] [2022-03-19 05:26:57,725 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:26:57,725 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 2 times [2022-03-19 05:26:57,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:26:57,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956800828] [2022-03-19 05:26:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:26:57,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:26:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:26:57,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 05:26:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:26:57,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 05:26:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:26:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 05:26:57,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:26:57,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956800828] [2022-03-19 05:26:57,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956800828] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:26:57,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:26:57,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:26:57,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:26:57,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1817661376] [2022-03-19 05:26:57,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1817661376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:26:57,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:26:57,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:26:57,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349833254] [2022-03-19 05:26:57,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:26:57,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:26:57,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:26:57,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:26:57,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:26:57,855 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 05:26:58,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:26:58,041 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-03-19 05:26:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 05:26:58,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-19 05:26:58,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:26:58,045 INFO L225 Difference]: With dead ends: 43 [2022-03-19 05:26:58,045 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 05:26:58,045 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 05:26:58,046 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:26:58,046 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:26:58,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 05:26:58,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-19 05:26:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 05:26:58,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-03-19 05:26:58,060 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-03-19 05:26:58,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:26:58,061 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-03-19 05:26:58,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 05:26:58,061 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-03-19 05:26:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 05:26:58,062 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:26:58,062 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:26:58,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 05:26:58,062 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:26:58,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:26:58,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2022-03-19 05:26:58,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:26:58,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1248474836] [2022-03-19 05:26:58,064 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:26:58,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 2 times [2022-03-19 05:26:58,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:26:58,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494823608] [2022-03-19 05:26:58,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:26:58,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:26:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:26:58,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 05:26:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:26:58,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 05:26:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:26:58,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 05:26:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:26:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 05:26:58,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:26:58,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494823608] [2022-03-19 05:26:58,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494823608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:26:58,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:26:58,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:26:58,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:26:58,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1248474836] [2022-03-19 05:26:58,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1248474836] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:26:58,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:26:58,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:26:58,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475733635] [2022-03-19 05:26:58,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:26:58,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:26:58,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:26:58,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:26:58,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:26:58,120 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 05:26:58,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:26:58,251 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-03-19 05:26:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 05:26:58,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-19 05:26:58,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:26:58,253 INFO L225 Difference]: With dead ends: 47 [2022-03-19 05:26:58,253 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 05:26:58,253 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 05:26:58,254 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:26:58,254 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:26:58,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 05:26:58,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-03-19 05:26:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 05:26:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-03-19 05:26:58,261 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-03-19 05:26:58,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:26:58,262 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-03-19 05:26:58,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 05:26:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-03-19 05:26:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 05:26:58,262 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:26:58,262 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:26:58,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 05:26:58,263 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:26:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:26:58,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2022-03-19 05:26:58,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:26:58,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [200460839] [2022-03-19 05:26:58,264 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:26:58,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 2 times [2022-03-19 05:26:58,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:26:58,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637803886] [2022-03-19 05:26:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:26:58,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:26:58,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:26:58,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300058188] [2022-03-19 05:26:58,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:26:58,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:26:58,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:26:58,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:26:58,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 05:26:58,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:26:58,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:26:58,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 05:26:58,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:26:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:26:58,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 05:26:58,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:26:58,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637803886] [2022-03-19 05:26:58,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:26:58,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300058188] [2022-03-19 05:26:58,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300058188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:26:58,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:26:58,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:26:58,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:26:58,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [200460839] [2022-03-19 05:26:58,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [200460839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:26:58,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:26:58,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:26:58,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802489098] [2022-03-19 05:26:58,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:26:58,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 05:26:58,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:26:58,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 05:26:58,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 05:26:58,457 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 05:26:58,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:26:58,495 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-03-19 05:26:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 05:26:58,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-19 05:26:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:26:58,496 INFO L225 Difference]: With dead ends: 66 [2022-03-19 05:26:58,496 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 05:26:58,497 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:26:58,497 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:26:58,497 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 138 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:26:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 05:26:58,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-19 05:26:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 05:26:58,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-03-19 05:26:58,505 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2022-03-19 05:26:58,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:26:58,506 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-03-19 05:26:58,506 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 05:26:58,506 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-03-19 05:26:58,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 05:26:58,506 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:26:58,506 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:26:58,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 05:26:58,724 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:26:58,724 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:26:58,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:26:58,725 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2022-03-19 05:26:58,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:26:58,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1858437061] [2022-03-19 05:26:58,725 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:26:58,726 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 2 times [2022-03-19 05:26:58,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:26:58,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150992962] [2022-03-19 05:26:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:26:58,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:26:58,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:26:58,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769486852] [2022-03-19 05:26:58,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:26:58,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:26:58,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:26:58,755 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:26:58,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 05:26:58,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:26:58,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:26:58,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 05:26:58,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:26:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 05:26:58,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 05:26:58,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:26:58,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150992962] [2022-03-19 05:26:58,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:26:58,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769486852] [2022-03-19 05:26:58,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769486852] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:26:58,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:26:58,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:26:58,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:26:58,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1858437061] [2022-03-19 05:26:58,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1858437061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:26:58,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:26:58,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:26:58,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357267395] [2022-03-19 05:26:58,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:26:58,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 05:26:58,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:26:58,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 05:26:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 05:26:58,881 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 05:26:58,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:26:58,924 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2022-03-19 05:26:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 05:26:58,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-19 05:26:58,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:26:58,925 INFO L225 Difference]: With dead ends: 65 [2022-03-19 05:26:58,925 INFO L226 Difference]: Without dead ends: 58 [2022-03-19 05:26:58,925 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:26:58,926 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:26:58,926 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:26:58,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-19 05:26:58,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-03-19 05:26:58,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 05:26:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-03-19 05:26:58,933 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2022-03-19 05:26:58,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:26:58,934 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-03-19 05:26:58,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 05:26:58,934 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-03-19 05:26:58,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 05:26:58,934 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:26:58,934 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:26:58,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 05:26:59,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:26:59,151 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:26:59,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:26:59,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2022-03-19 05:26:59,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:26:59,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [110824084] [2022-03-19 05:26:59,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:26:59,175 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:26:59,175 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:26:59,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 2 times [2022-03-19 05:26:59,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:26:59,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404820790] [2022-03-19 05:26:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:26:59,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:26:59,182 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:26:59,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443206206] [2022-03-19 05:26:59,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:26:59,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:26:59,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:26:59,183 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:26:59,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 05:26:59,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:26:59,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:26:59,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 05:26:59,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:26:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 05:26:59,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:26:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 05:26:59,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:26:59,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404820790] [2022-03-19 05:26:59,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:26:59,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443206206] [2022-03-19 05:26:59,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443206206] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 05:26:59,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 05:26:59,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-19 05:26:59,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:26:59,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [110824084] [2022-03-19 05:26:59,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [110824084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:26:59,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:26:59,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:26:59,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141332658] [2022-03-19 05:26:59,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:26:59,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 05:26:59,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:26:59,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 05:26:59,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 05:26:59,538 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 05:26:59,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:26:59,588 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-03-19 05:26:59,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 05:26:59,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-03-19 05:26:59,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:26:59,590 INFO L225 Difference]: With dead ends: 69 [2022-03-19 05:26:59,590 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 05:26:59,590 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 05:26:59,591 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:26:59,591 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:26:59,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 05:26:59,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-03-19 05:26:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 05:26:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-03-19 05:26:59,600 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 44 [2022-03-19 05:26:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:26:59,600 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-03-19 05:26:59,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 05:26:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-03-19 05:26:59,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 05:26:59,601 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:26:59,601 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2022-03-19 05:26:59,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 05:26:59,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:26:59,817 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:26:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:26:59,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2022-03-19 05:26:59,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:26:59,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [47018552] [2022-03-19 05:26:59,831 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:26:59,831 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:26:59,831 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:26:59,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 2 times [2022-03-19 05:26:59,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:26:59,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991190687] [2022-03-19 05:26:59,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:26:59,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:26:59,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:26:59,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977984907] [2022-03-19 05:26:59,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:26:59,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:26:59,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:26:59,851 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:26:59,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 05:26:59,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:26:59,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:26:59,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 05:26:59,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:27:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 05:27:00,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:27:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 05:27:00,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:27:00,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991190687] [2022-03-19 05:27:00,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:27:00,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977984907] [2022-03-19 05:27:00,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977984907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:27:00,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:27:00,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-19 05:27:00,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:27:00,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [47018552] [2022-03-19 05:27:00,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [47018552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:27:00,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:27:00,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 05:27:00,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991278371] [2022-03-19 05:27:00,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:27:00,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 05:27:00,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:27:00,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 05:27:00,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 05:27:00,983 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-19 05:27:01,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:27:01,082 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2022-03-19 05:27:01,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 05:27:01,082 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2022-03-19 05:27:01,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:27:01,084 INFO L225 Difference]: With dead ends: 130 [2022-03-19 05:27:01,084 INFO L226 Difference]: Without dead ends: 101 [2022-03-19 05:27:01,084 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-19 05:27:01,085 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 11 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:27:01,085 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 239 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:27:01,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-19 05:27:01,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-03-19 05:27:01,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 25 states have call successors, (25), 14 states have call predecessors, (25), 13 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 05:27:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2022-03-19 05:27:01,098 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 64 [2022-03-19 05:27:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:27:01,098 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2022-03-19 05:27:01,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-19 05:27:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2022-03-19 05:27:01,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 05:27:01,099 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:27:01,099 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 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] [2022-03-19 05:27:01,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 05:27:01,316 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:27:01,317 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:27:01,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:27:01,317 INFO L85 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 3 times [2022-03-19 05:27:01,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:27:01,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [890023026] [2022-03-19 05:27:01,321 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:27:01,321 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:27:01,321 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:27:01,321 INFO L85 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 4 times [2022-03-19 05:27:01,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:27:01,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167252305] [2022-03-19 05:27:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:27:01,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:27:01,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:27:01,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052713597] [2022-03-19 05:27:01,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:27:01,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:27:01,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:27:01,339 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:27:01,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 05:27:01,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:27:01,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:27:01,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 05:27:01,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:27:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 05:27:01,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:27:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 05:27:02,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:27:02,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167252305] [2022-03-19 05:27:02,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:27:02,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052713597] [2022-03-19 05:27:02,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052713597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:27:02,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:27:02,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-19 05:27:02,664 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:27:02,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [890023026] [2022-03-19 05:27:02,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [890023026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:27:02,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:27:02,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:27:02,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026619659] [2022-03-19 05:27:02,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:27:02,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:27:02,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:27:02,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:27:02,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 05:27:02,666 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-19 05:27:02,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:27:02,740 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2022-03-19 05:27:02,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 05:27:02,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2022-03-19 05:27:02,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:27:02,744 INFO L225 Difference]: With dead ends: 126 [2022-03-19 05:27:02,744 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 05:27:02,744 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-19 05:27:02,745 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:27:02,745 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 199 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:27:02,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 05:27:02,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-19 05:27:02,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 66 states have internal predecessors, (69), 26 states have call successors, (26), 15 states have call predecessors, (26), 14 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 05:27:02,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-03-19 05:27:02,772 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 69 [2022-03-19 05:27:02,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:27:02,773 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-03-19 05:27:02,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-19 05:27:02,773 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-03-19 05:27:02,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 05:27:02,778 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:27:02,778 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2022-03-19 05:27:02,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 05:27:02,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:27:02,998 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:27:02,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:27:02,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 1 times [2022-03-19 05:27:02,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:27:02,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [651478148] [2022-03-19 05:27:03,002 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:27:03,002 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:27:03,003 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:27:03,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 2 times [2022-03-19 05:27:03,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:27:03,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812965372] [2022-03-19 05:27:03,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:27:03,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:27:03,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:27:03,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746962899] [2022-03-19 05:27:03,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:27:03,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:27:03,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:27:03,028 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:27:03,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 05:27:03,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:27:03,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:27:03,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 05:27:03,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:27:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 62 proven. 30 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-03-19 05:27:03,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:27:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-19 05:27:03,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:27:03,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812965372] [2022-03-19 05:27:03,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:27:03,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746962899] [2022-03-19 05:27:03,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746962899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:27:03,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:27:03,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-19 05:27:03,659 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:27:03,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [651478148] [2022-03-19 05:27:03,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [651478148] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:27:03,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:27:03,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 05:27:03,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194333720] [2022-03-19 05:27:03,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:27:03,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 05:27:03,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:27:03,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 05:27:03,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-19 05:27:03,661 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-19 05:27:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:27:03,839 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2022-03-19 05:27:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 05:27:03,840 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-03-19 05:27:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:27:03,840 INFO L225 Difference]: With dead ends: 109 [2022-03-19 05:27:03,840 INFO L226 Difference]: Without dead ends: 81 [2022-03-19 05:27:03,841 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-19 05:27:03,841 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 16 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:27:03,841 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 207 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:27:03,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-19 05:27:03,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-19 05:27:03,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.125) internal successors, (54), 51 states have internal predecessors, (54), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 05:27:03,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2022-03-19 05:27:03,847 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 75 [2022-03-19 05:27:03,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:27:03,848 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2022-03-19 05:27:03,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-19 05:27:03,848 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2022-03-19 05:27:03,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 05:27:03,848 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:27:03,848 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 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] [2022-03-19 05:27:03,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 05:27:04,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:27:04,060 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:27:04,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:27:04,060 INFO L85 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 5 times [2022-03-19 05:27:04,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:27:04,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [668760262] [2022-03-19 05:27:04,064 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:27:04,064 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:27:04,064 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:27:04,064 INFO L85 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 6 times [2022-03-19 05:27:04,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:27:04,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279402392] [2022-03-19 05:27:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:27:04,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:27:04,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:27:04,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896074447] [2022-03-19 05:27:04,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:27:04,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:27:04,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:27:04,072 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:27:04,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 05:27:04,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 05:27:04,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:27:04,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 05:27:04,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:27:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 05:27:04,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:27:27,121 WARN L232 SmtUtils]: Spent 6.62s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:28:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 05:28:14,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:28:14,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279402392] [2022-03-19 05:28:14,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:28:14,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896074447] [2022-03-19 05:28:14,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896074447] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:28:14,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:28:14,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-03-19 05:28:14,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:28:14,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [668760262] [2022-03-19 05:28:14,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [668760262] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:14,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:14,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 05:28:14,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927323122] [2022-03-19 05:28:14,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:28:14,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 05:28:14,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:14,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 05:28:14,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-19 05:28:14,963 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 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) [2022-03-19 05:28:15,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:28:15,111 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2022-03-19 05:28:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 05:28:15,111 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 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 81 [2022-03-19 05:28:15,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:28:15,112 INFO L225 Difference]: With dead ends: 106 [2022-03-19 05:28:15,112 INFO L226 Difference]: Without dead ends: 94 [2022-03-19 05:28:15,112 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-03-19 05:28:15,113 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:28:15,113 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 130 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:28:15,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-19 05:28:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-03-19 05:28:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 05:28:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2022-03-19 05:28:15,120 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 81 [2022-03-19 05:28:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:28:15,121 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2022-03-19 05:28:15,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 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) [2022-03-19 05:28:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2022-03-19 05:28:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 05:28:15,121 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:28:15,121 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2022-03-19 05:28:15,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 05:28:15,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:28:15,336 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:28:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:28:15,336 INFO L85 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 7 times [2022-03-19 05:28:15,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:15,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1716803285] [2022-03-19 05:28:15,338 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:28:15,339 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:28:15,339 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:28:15,339 INFO L85 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 8 times [2022-03-19 05:28:15,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:28:15,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931322153] [2022-03-19 05:28:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:28:15,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:28:15,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:28:15,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510836994] [2022-03-19 05:28:15,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:28:15,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:28:15,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:28:15,346 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:28:15,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 05:28:15,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:28:15,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:28:15,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 05:28:15,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:28:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 05:28:15,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:28:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-03-19 05:28:16,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:28:16,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931322153] [2022-03-19 05:28:16,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:28:16,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510836994] [2022-03-19 05:28:16,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510836994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:28:16,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:28:16,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-19 05:28:16,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:28:16,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1716803285] [2022-03-19 05:28:16,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1716803285] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:16,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:16,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 05:28:16,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633479080] [2022-03-19 05:28:16,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:28:16,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 05:28:16,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:16,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 05:28:16,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-19 05:28:16,642 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-19 05:28:16,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:28:16,743 INFO L93 Difference]: Finished difference Result 170 states and 221 transitions. [2022-03-19 05:28:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 05:28:16,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 86 [2022-03-19 05:28:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:28:16,744 INFO L225 Difference]: With dead ends: 170 [2022-03-19 05:28:16,744 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 05:28:16,744 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 161 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-19 05:28:16,745 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 10 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:28:16,745 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 277 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:28:16,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 05:28:16,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-03-19 05:28:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 78 states have (on average 1.141025641025641) internal successors, (89), 82 states have internal predecessors, (89), 36 states have call successors, (36), 16 states have call predecessors, (36), 15 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-19 05:28:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 158 transitions. [2022-03-19 05:28:16,755 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 158 transitions. Word has length 86 [2022-03-19 05:28:16,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:28:16,755 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 158 transitions. [2022-03-19 05:28:16,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-19 05:28:16,756 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 158 transitions. [2022-03-19 05:28:16,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-19 05:28:16,756 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:28:16,756 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 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] [2022-03-19 05:28:16,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-19 05:28:16,961 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 05:28:16,961 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:28:16,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:28:16,961 INFO L85 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 9 times [2022-03-19 05:28:16,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:16,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [53229323] [2022-03-19 05:28:16,969 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:28:16,970 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:28:16,970 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:28:16,970 INFO L85 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 10 times [2022-03-19 05:28:16,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:28:16,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563544812] [2022-03-19 05:28:16,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:28:16,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:28:17,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:28:17,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511985651] [2022-03-19 05:28:17,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:28:17,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:28:17,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:28:17,012 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:28:17,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 05:28:17,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:28:17,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:28:17,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 05:28:17,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:28:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 05:28:17,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:28:18,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:28:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563544812] [2022-03-19 05:28:18,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:28:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511985651] [2022-03-19 05:28:18,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511985651] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 05:28:18,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 05:28:18,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 05:28:18,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:28:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [53229323] [2022-03-19 05:28:18,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [53229323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:18,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:18,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 05:28:18,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014958704] [2022-03-19 05:28:18,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:28:18,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 05:28:18,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:18,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 05:28:18,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-19 05:28:18,017 INFO L87 Difference]: Start difference. First operand 130 states and 158 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 05:28:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:28:18,222 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2022-03-19 05:28:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 05:28:18,222 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2022-03-19 05:28:18,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:28:18,223 INFO L225 Difference]: With dead ends: 164 [2022-03-19 05:28:18,223 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 05:28:18,224 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-03-19 05:28:18,224 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 32 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:28:18,224 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 396 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:28:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 05:28:18,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2022-03-19 05:28:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 21 states have call successors, (21), 15 states have call predecessors, (21), 13 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 05:28:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2022-03-19 05:28:18,231 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 94 [2022-03-19 05:28:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:28:18,232 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2022-03-19 05:28:18,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 05:28:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2022-03-19 05:28:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 05:28:18,232 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:28:18,233 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:28:18,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 05:28:18,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:28:18,464 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:28:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:28:18,464 INFO L85 PathProgramCache]: Analyzing trace with hash -282067362, now seen corresponding path program 1 times [2022-03-19 05:28:18,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:18,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1438880736] [2022-03-19 05:28:18,467 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:28:18,467 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:28:18,467 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:28:18,467 INFO L85 PathProgramCache]: Analyzing trace with hash -282067362, now seen corresponding path program 2 times [2022-03-19 05:28:18,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:28:18,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248929660] [2022-03-19 05:28:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:28:18,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:28:18,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:28:18,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327786226] [2022-03-19 05:28:18,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:28:18,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:28:18,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:28:18,490 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:28:18,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 05:28:18,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:28:18,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:28:18,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 05:28:18,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:28:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 68 proven. 32 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-03-19 05:28:19,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:28:34,048 WARN L232 SmtUtils]: Spent 5.35s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:28:55,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:28:55,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248929660] [2022-03-19 05:28:55,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:28:55,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327786226] [2022-03-19 05:28:55,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327786226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 05:28:55,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 05:28:55,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 05:28:55,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:28:55,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1438880736] [2022-03-19 05:28:55,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1438880736] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:55,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:55,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 05:28:55,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386634845] [2022-03-19 05:28:55,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:28:55,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 05:28:55,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:55,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 05:28:55,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-03-19 05:28:55,406 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 05:28:57,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:28:57,741 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2022-03-19 05:28:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 05:28:57,741 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 105 [2022-03-19 05:28:57,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:28:57,741 INFO L225 Difference]: With dead ends: 114 [2022-03-19 05:28:57,741 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 05:28:57,742 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=128, Invalid=521, Unknown=1, NotChecked=0, Total=650 [2022-03-19 05:28:57,742 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 05:28:57,742 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 341 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 05:28:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 05:28:57,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 05:28:57,743 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) [2022-03-19 05:28:57,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 05:28:57,743 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2022-03-19 05:28:57,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:28:57,743 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 05:28:57,743 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 05:28:57,743 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 05:28:57,743 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 05:28:57,745 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 05:28:57,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 05:28:57,946 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 05:28:57,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 05:28:59,433 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-03-19 05:28:59,433 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-03-19 05:28:59,433 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-03-19 05:28:59,433 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-03-19 05:28:59,433 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-19 05:28:59,434 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-19 05:28:59,434 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-19 05:28:59,434 INFO L878 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (and (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) [2022-03-19 05:28:59,434 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 61) the Hoare annotation is: true [2022-03-19 05:28:59,434 INFO L878 garLoopResultBuilder]: At program point L52(lines 52 55) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse5 (* main_~B~0 2)) (.cse3 (= main_~B~0 main_~d~0)) (.cse4 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 (= main_~p~0 2) (= main_~d~0 2) (<= main_~r~0 2) .cse1 .cse2 (<= .cse5 main_~r~0)) (and (< 0 (div main_~q~0 2)) (<= 0 main_~r~0) .cse2 (<= main_~A~0 (+ .cse5 main_~r~0)) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) (< 0 (div (+ 2 (* (- 1) main_~r~0)) 2)) .cse3 .cse4))) [2022-03-19 05:28:59,434 INFO L878 garLoopResultBuilder]: At program point L52-2(lines 22 61) the Hoare annotation is: (let ((.cse4 (= main_~A~0 main_~r~0)) (.cse5 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse0 (* main_~B~0 2)) (.cse3 (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0)) (.cse6 (= main_~B~0 main_~d~0)) (.cse7 (= main_~p~0 1))) (or (let ((.cse1 (+ main_~d~0 main_~r~0))) (and (<= main_~p~0 main_~q~0) (<= .cse0 .cse1) (<= .cse1 2) (= main_~d~0 2) .cse2 (<= main_~A~0 .cse1) (< 0 (div main_~p~0 2)) .cse3)) (and .cse4 .cse5 .cse2 .cse6 .cse7) (and .cse4 (<= main_~r~0 2) .cse5 .cse2 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) (<= .cse0 main_~r~0)) (and .cse4 (= .cse0 main_~d~0) (= main_~p~0 2) .cse5 .cse2) (and .cse2 (= main_~q~0 1) .cse3 .cse6 .cse7) (and (<= 0 main_~A~0) (<= 0 main_~r~0) (not (<= main_~d~0 main_~r~0)) .cse2 (<= main_~A~0 (+ .cse0 main_~r~0)) .cse3 .cse6 .cse7))) [2022-03-19 05:28:59,434 INFO L878 garLoopResultBuilder]: At program point L46(lines 44 56) the Hoare annotation is: (let ((.cse4 (= main_~A~0 main_~r~0)) (.cse0 (* main_~B~0 2)) (.cse5 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse3 (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0)) (.cse6 (= main_~B~0 main_~d~0)) (.cse7 (= main_~p~0 1))) (or (let ((.cse1 (+ main_~d~0 main_~r~0))) (and (<= main_~p~0 main_~q~0) (<= .cse0 .cse1) (<= .cse1 2) (= main_~d~0 2) .cse2 (<= main_~A~0 .cse1) (< 0 (div main_~p~0 2)) .cse3)) (and .cse4 .cse5 .cse2 .cse6 .cse7) (and .cse4 (<= main_~r~0 2) .cse5 .cse2 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) (<= .cse0 main_~r~0)) (and .cse4 (= .cse0 main_~d~0) (= main_~p~0 2) .cse5 .cse2) (and .cse2 (= main_~q~0 1) .cse3 .cse6 .cse7) (and (= (+ (* main_~d~0 main_~q~0) main_~r~0) main_~A~0) (<= 0 main_~A~0) (<= 0 main_~r~0) (<= main_~A~0 2) (not (<= main_~d~0 main_~r~0)) (= main_~d~0 1) .cse6 .cse7))) [2022-03-19 05:28:59,434 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 61) the Hoare annotation is: true [2022-03-19 05:28:59,434 INFO L878 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (let ((.cse0 (= main_~B~0 1)) (.cse1 (= main_~B~0 main_~d~0)) (.cse2 (= main_~p~0 1))) (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) .cse0 .cse1 .cse2) (and (= (+ (* main_~d~0 main_~q~0) main_~r~0) main_~A~0) (<= 0 main_~A~0) (<= 0 main_~r~0) (not (<= main_~d~0 main_~r~0)) .cse0 (<= main_~A~0 (+ (* main_~B~0 2) main_~r~0)) .cse1 .cse2) (and (= (+ main_~d~0 main_~r~0) main_~A~0) .cse0 (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) .cse1 .cse2))) [2022-03-19 05:28:59,434 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse4 (<= 0 main_~A~0)) (.cse0 (= main_~A~0 main_~r~0)) (.cse1 (<= main_~r~0 2)) (.cse2 (= main_~q~0 0)) (.cse3 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) (<= (* main_~B~0 2) main_~r~0)) (and .cse4 .cse0 (= main_~p~0 2) (= main_~d~0 2) .cse1 .cse2 .cse3) (and .cse4 .cse0 .cse1 .cse2 .cse3 (= main_~B~0 main_~d~0) (= main_~p~0 1)))) [2022-03-19 05:28:59,434 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse4 (<= 0 main_~A~0)) (.cse0 (= main_~A~0 main_~r~0)) (.cse1 (<= main_~r~0 2)) (.cse2 (= main_~q~0 0)) (.cse3 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) (<= (* main_~B~0 2) main_~r~0)) (and .cse4 .cse0 (= main_~p~0 2) (= main_~d~0 2) .cse1 .cse2 .cse3) (and .cse4 .cse0 .cse1 .cse2 .cse3 (= main_~B~0 main_~d~0) (= main_~p~0 1)))) [2022-03-19 05:28:59,434 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 61) the Hoare annotation is: true [2022-03-19 05:28:59,434 INFO L885 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: true [2022-03-19 05:28:59,434 INFO L885 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: true [2022-03-19 05:28:59,434 INFO L878 garLoopResultBuilder]: At program point L26-1(line 26) the Hoare annotation is: (and (<= 0 main_~A~0) (<= main_~A~0 2)) [2022-03-19 05:28:59,434 INFO L878 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (let ((.cse4 (= main_~A~0 main_~r~0)) (.cse5 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse0 (* main_~B~0 2)) (.cse3 (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0)) (.cse6 (= main_~B~0 main_~d~0)) (.cse7 (= main_~p~0 1))) (or (let ((.cse1 (+ main_~d~0 main_~r~0))) (and (<= main_~p~0 main_~q~0) (<= .cse0 .cse1) (<= .cse1 2) (= main_~d~0 2) .cse2 (<= main_~A~0 .cse1) (< 0 (div main_~p~0 2)) .cse3)) (and .cse4 .cse5 .cse2 .cse6 .cse7) (and .cse4 (<= main_~r~0 2) .cse5 .cse2 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) (<= .cse0 main_~r~0)) (and .cse4 (= .cse0 main_~d~0) (= main_~p~0 2) .cse5 .cse2) (and .cse2 (= main_~q~0 1) .cse3 .cse6 .cse7) (and (<= 0 main_~A~0) (<= 0 main_~r~0) (not (<= main_~d~0 main_~r~0)) .cse2 (<= main_~A~0 (+ .cse0 main_~r~0)) .cse3 .cse6 .cse7))) [2022-03-19 05:28:59,435 INFO L878 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (let ((.cse4 (= main_~A~0 main_~r~0)) (.cse0 (* main_~B~0 2)) (.cse5 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse3 (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0)) (.cse6 (= main_~B~0 main_~d~0)) (.cse7 (= main_~p~0 1))) (or (let ((.cse1 (+ main_~d~0 main_~r~0))) (and (<= main_~p~0 main_~q~0) (<= .cse0 .cse1) (<= .cse1 2) (= main_~d~0 2) .cse2 (<= main_~A~0 .cse1) (< 0 (div main_~p~0 2)) .cse3)) (and .cse4 .cse5 .cse2 .cse6 .cse7) (and .cse4 (<= main_~r~0 2) .cse5 .cse2 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) (<= .cse0 main_~r~0)) (and .cse4 (= .cse0 main_~d~0) (= main_~p~0 2) .cse5 .cse2) (and .cse2 (= main_~q~0 1) .cse3 .cse6 .cse7) (and (= (+ (* main_~d~0 main_~q~0) main_~r~0) main_~A~0) (<= 0 main_~A~0) (<= 0 main_~r~0) (<= main_~A~0 2) (not (<= main_~d~0 main_~r~0)) (= main_~d~0 1) .cse6 .cse7))) [2022-03-19 05:28:59,435 INFO L878 garLoopResultBuilder]: At program point L37(lines 34 42) the Hoare annotation is: (let ((.cse4 (<= 0 main_~A~0)) (.cse0 (= main_~A~0 main_~r~0)) (.cse1 (<= main_~r~0 2)) (.cse2 (= main_~q~0 0)) (.cse3 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) (<= (* main_~B~0 2) main_~r~0)) (and .cse4 .cse0 (= main_~p~0 2) (= main_~d~0 2) .cse1 .cse2 .cse3) (and .cse4 .cse0 .cse1 .cse2 .cse3 (= main_~B~0 main_~d~0) (= main_~p~0 1)))) [2022-03-19 05:28:59,435 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse4 (<= 0 main_~A~0)) (.cse0 (= main_~A~0 main_~r~0)) (.cse1 (<= main_~r~0 2)) (.cse2 (= main_~q~0 0)) (.cse3 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) (<= (* main_~B~0 2) main_~r~0)) (and .cse4 .cse0 (= main_~p~0 2) (= main_~d~0 2) .cse1 .cse2 .cse3) (and .cse4 .cse0 .cse1 .cse2 .cse3 (= main_~B~0 main_~d~0) (= main_~p~0 1)))) [2022-03-19 05:28:59,435 INFO L878 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse4 (<= 0 main_~A~0)) (.cse0 (= main_~A~0 main_~r~0)) (.cse1 (<= main_~r~0 2)) (.cse2 (= main_~q~0 0)) (.cse3 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) (<= (* main_~B~0 2) main_~r~0)) (and .cse4 .cse0 (= main_~p~0 2) (= main_~d~0 2) .cse1 .cse2 .cse3) (and .cse4 .cse0 .cse1 .cse2 .cse3 (= main_~B~0 main_~d~0) (= main_~p~0 1)))) [2022-03-19 05:28:59,435 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-19 05:28:59,435 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-19 05:28:59,435 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-19 05:28:59,435 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-19 05:28:59,435 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-19 05:28:59,435 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-19 05:28:59,435 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-19 05:28:59,435 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-19 05:28:59,435 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 05:28:59,435 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-19 05:28:59,435 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 05:28:59,435 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 05:28:59,435 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-19 05:28:59,437 INFO L718 BasicCegarLoop]: Path program histogram: [10, 2, 2, 2, 2, 2, 2, 2, 2] [2022-03-19 05:28:59,438 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 05:28:59,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 05:28:59 BoogieIcfgContainer [2022-03-19 05:28:59,449 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 05:28:59,449 INFO L158 Benchmark]: Toolchain (without parser) took 122764.67ms. Allocated memory was 191.9MB in the beginning and 325.1MB in the end (delta: 133.2MB). Free memory was 133.3MB in the beginning and 112.7MB in the end (delta: 20.7MB). Peak memory consumption was 154.3MB. Max. memory is 8.0GB. [2022-03-19 05:28:59,449 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 191.9MB. Free memory is still 150.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 05:28:59,450 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.10ms. Allocated memory was 191.9MB in the beginning and 270.5MB in the end (delta: 78.6MB). Free memory was 133.1MB in the beginning and 241.9MB in the end (delta: -108.7MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. [2022-03-19 05:28:59,450 INFO L158 Benchmark]: Boogie Preprocessor took 34.03ms. Allocated memory is still 270.5MB. Free memory was 241.9MB in the beginning and 240.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-19 05:28:59,450 INFO L158 Benchmark]: RCFGBuilder took 312.28ms. Allocated memory is still 270.5MB. Free memory was 240.3MB in the beginning and 229.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-19 05:28:59,450 INFO L158 Benchmark]: TraceAbstraction took 122170.45ms. Allocated memory was 270.5MB in the beginning and 325.1MB in the end (delta: 54.5MB). Free memory was 229.3MB in the beginning and 112.7MB in the end (delta: 116.6MB). Peak memory consumption was 172.7MB. Max. memory is 8.0GB. [2022-03-19 05:28:59,451 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 191.9MB. Free memory is still 150.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 243.10ms. Allocated memory was 191.9MB in the beginning and 270.5MB in the end (delta: 78.6MB). Free memory was 133.1MB in the beginning and 241.9MB in the end (delta: -108.7MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.03ms. Allocated memory is still 270.5MB. Free memory was 241.9MB in the beginning and 240.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 312.28ms. Allocated memory is still 270.5MB. Free memory was 240.3MB in the beginning and 229.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 122170.45ms. Allocated memory was 270.5MB in the beginning and 325.1MB in the end (delta: 54.5MB). Free memory was 229.3MB in the beginning and 112.7MB in the end (delta: 116.6MB). Peak memory consumption was 172.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 122.1s, OverallIterations: 13, TraceHistogramMax: 16, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 276 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 225 mSDsluCounter, 2289 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1787 mSDsCounter, 227 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1553 IncrementalHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 227 mSolverCounterUnsat, 502 mSDtfsCounter, 1553 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1195 GetRequests, 1051 SyntacticMatches, 14 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 15.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=11, InterpolantAutomatonStates: 94, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 30 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 35 LocationsWithAnnotation, 575 PreInvPairs, 763 NumberOfFragments, 1206 HoareAnnotationTreeSize, 575 FomulaSimplifications, 791 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 35 FomulaSimplificationsInter, 1477 FormulaSimplificationTreeSizeReductionInter, 1.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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: 34]: Loop Invariant Derived loop invariant: (((((((A == r && r <= 2) && q == 0) && B == 1) && d == B * 4) && p == 4) && B * 2 <= r) || ((((((0 <= A && A == r) && p == 2) && d == 2) && r <= 2) && q == 0) && B == 1)) || ((((((0 <= A && A == r) && r <= 2) && q == 0) && B == 1) && B == d) && p == 1) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-03-19 05:28:59,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...