/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 00:16:42,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 00:16:42,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 00:16:42,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 00:16:42,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-20 00:16:42,208 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 00:16:42,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 00:16:42,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 00:16:42,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 00:16:42,211 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 00:16:42,211 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 00:16:42,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 00:16:42,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 00:16:42,212 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 00:16:42,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 00:16:42,212 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 00:16:42,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 00:16:42,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 00:16:42,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 00:16:42,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 00:16:42,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 00:16:42,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 00:16:42,214 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 00:16:42,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 00:16:42,215 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 00:16:42,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 00:16:42,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 00:16:42,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 00:16:42,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 00:16:42,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:16:42,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 00:16:42,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 00:16:42,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 00:16:42,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 00:16:42,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 00:16:42,216 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 00:16:42,216 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 00:16:42,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 00:16:42,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 00:16:42,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 00:16:42,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 00:16:42,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 00:16:42,499 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 00:16:42,499 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 00:16:42,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound20.i [2022-03-20 00:16:42,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a627b2c/638033236e8b4b4e8469dc1dd201b84c/FLAG3e4eaf8f8 [2022-03-20 00:16:42,966 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 00:16:42,967 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound20.i [2022-03-20 00:16:42,975 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a627b2c/638033236e8b4b4e8469dc1dd201b84c/FLAG3e4eaf8f8 [2022-03-20 00:16:43,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a627b2c/638033236e8b4b4e8469dc1dd201b84c [2022-03-20 00:16:43,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 00:16:43,370 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 00:16:43,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 00:16:43,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 00:16:43,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 00:16:43,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:16:43" (1/1) ... [2022-03-20 00:16:43,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21e1cff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:16:43, skipping insertion in model container [2022-03-20 00:16:43,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:16:43" (1/1) ... [2022-03-20 00:16:43,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 00:16:43,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 00:16:43,561 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/divbin_unwindbound20.i[950,963] [2022-03-20 00:16:43,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:16:43,581 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 00:16:43,591 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/divbin_unwindbound20.i[950,963] [2022-03-20 00:16:43,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:16:43,606 INFO L208 MainTranslator]: Completed translation [2022-03-20 00:16:43,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:16:43 WrapperNode [2022-03-20 00:16:43,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 00:16:43,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 00:16:43,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 00:16:43,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 00:16:43,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:16:43" (1/1) ... [2022-03-20 00:16:43,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:16:43" (1/1) ... [2022-03-20 00:16:43,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:16:43" (1/1) ... [2022-03-20 00:16:43,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:16:43" (1/1) ... [2022-03-20 00:16:43,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:16:43" (1/1) ... [2022-03-20 00:16:43,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:16:43" (1/1) ... [2022-03-20 00:16:43,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:16:43" (1/1) ... [2022-03-20 00:16:43,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 00:16:43,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 00:16:43,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 00:16:43,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 00:16:43,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:16:43" (1/1) ... [2022-03-20 00:16:43,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:16:43,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:16:43,681 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) [2022-03-20 00:16:43,710 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 [2022-03-20 00:16:43,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 00:16:43,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 00:16:43,738 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 00:16:43,739 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 00:16:43,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 00:16:43,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 00:16:43,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 00:16:43,740 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 00:16:43,740 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 00:16:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 00:16:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 00:16:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 00:16:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 00:16:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 00:16:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 00:16:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 00:16:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 00:16:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 00:16:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 00:16:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 00:16:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 00:16:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 00:16:43,829 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 00:16:43,831 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 00:16:43,932 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 00:16:43,937 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 00:16:43,938 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 00:16:43,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:16:43 BoogieIcfgContainer [2022-03-20 00:16:43,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 00:16:43,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 00:16:43,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 00:16:43,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 00:16:43,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:16:43" (1/3) ... [2022-03-20 00:16:43,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a43922d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:16:43, skipping insertion in model container [2022-03-20 00:16:43,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:16:43" (2/3) ... [2022-03-20 00:16:43,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a43922d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:16:43, skipping insertion in model container [2022-03-20 00:16:43,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:16:43" (3/3) ... [2022-03-20 00:16:43,963 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound20.i [2022-03-20 00:16:43,968 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 00:16:43,968 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 00:16:44,031 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 00:16:44,044 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-03-20 00:16:44,044 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 00:16:44,073 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 00:16:44,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 00:16:44,086 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:16:44,087 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:16:44,087 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:16:44,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:16:44,098 INFO L85 PathProgramCache]: Analyzing trace with hash 878397729, now seen corresponding path program 1 times [2022-03-20 00:16:44,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:16:44,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144806006] [2022-03-20 00:16:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:44,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:16:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:16:44,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:16:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:16:44,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:16:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:16:44,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 00:16:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:16:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:16:44,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:16:44,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144806006] [2022-03-20 00:16:44,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144806006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:16:44,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:16:44,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 00:16:44,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607757379] [2022-03-20 00:16:44,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:16:44,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 00:16:44,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:16:44,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 00:16:44,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:16:44,355 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 00:16:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:16:44,424 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2022-03-20 00:16:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 00:16:44,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 00:16:44,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:16:44,434 INFO L225 Difference]: With dead ends: 60 [2022-03-20 00:16:44,434 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 00:16:44,437 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:16:44,440 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:16:44,441 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 40 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:16:44,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 00:16:44,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-20 00:16:44,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 00:16:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-03-20 00:16:44,476 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2022-03-20 00:16:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:16:44,476 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-03-20 00:16:44,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 00:16:44,477 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-03-20 00:16:44,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 00:16:44,478 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:16:44,479 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:16:44,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 00:16:44,479 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:16:44,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:16:44,480 INFO L85 PathProgramCache]: Analyzing trace with hash 994169231, now seen corresponding path program 1 times [2022-03-20 00:16:44,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:16:44,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586104064] [2022-03-20 00:16:44,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:44,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:16:44,518 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:16:44,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032749195] [2022-03-20 00:16:44,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:44,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:16:44,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:16:44,525 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) [2022-03-20 00:16:44,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 00:16:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:16:44,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 00:16:44,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:16:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:16:44,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:16:44,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:16:44,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586104064] [2022-03-20 00:16:44,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:16:44,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032749195] [2022-03-20 00:16:44,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032749195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:16:44,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:16:44,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 00:16:44,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046005347] [2022-03-20 00:16:44,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:16:44,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 00:16:44,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:16:44,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 00:16:44,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 00:16:44,704 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 00:16:44,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:16:44,727 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-03-20 00:16:44,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 00:16:44,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-03-20 00:16:44,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:16:44,729 INFO L225 Difference]: With dead ends: 42 [2022-03-20 00:16:44,729 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 00:16:44,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 00:16:44,731 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:16:44,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:16:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 00:16:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 00:16:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 00:16:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-03-20 00:16:44,740 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2022-03-20 00:16:44,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:16:44,741 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-03-20 00:16:44,741 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 00:16:44,742 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-03-20 00:16:44,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 00:16:44,743 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:16:44,743 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:16:44,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 00:16:44,944 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:16:44,944 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:16:44,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:16:44,945 INFO L85 PathProgramCache]: Analyzing trace with hash 422434646, now seen corresponding path program 1 times [2022-03-20 00:16:44,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:16:44,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204106492] [2022-03-20 00:16:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:44,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:16:44,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:16:44,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736784161] [2022-03-20 00:16:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:44,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:16:44,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:16:44,975 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) [2022-03-20 00:16:44,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 00:16:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:16:45,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:16:45,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:16:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:16:45,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:16:45,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:16:45,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204106492] [2022-03-20 00:16:45,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:16:45,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736784161] [2022-03-20 00:16:45,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736784161] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:16:45,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:16:45,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:16:45,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043794836] [2022-03-20 00:16:45,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:16:45,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:16:45,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:16:45,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:16:45,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:16:45,134 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 00:16:45,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:16:45,205 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-03-20 00:16:45,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:16:45,206 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-03-20 00:16:45,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:16:45,207 INFO L225 Difference]: With dead ends: 41 [2022-03-20 00:16:45,208 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 00:16:45,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:16:45,212 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:16:45,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 97 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:16:45,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 00:16:45,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-03-20 00:16:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 00:16:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-03-20 00:16:45,225 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2022-03-20 00:16:45,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:16:45,226 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-03-20 00:16:45,226 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 00:16:45,226 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-03-20 00:16:45,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 00:16:45,227 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:16:45,227 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:16:45,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 00:16:45,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 00:16:45,428 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:16:45,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:16:45,429 INFO L85 PathProgramCache]: Analyzing trace with hash 424222106, now seen corresponding path program 1 times [2022-03-20 00:16:45,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:16:45,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200255684] [2022-03-20 00:16:45,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:45,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:16:45,446 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:16:45,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989265581] [2022-03-20 00:16:45,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:45,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:16:45,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:16:45,448 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) [2022-03-20 00:16:45,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 00:16:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:16:45,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 00:16:45,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:16:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 00:16:45,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:16:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:16:46,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:16:46,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200255684] [2022-03-20 00:16:46,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:16:46,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989265581] [2022-03-20 00:16:46,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989265581] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:16:46,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:16:46,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-20 00:16:46,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913835242] [2022-03-20 00:16:46,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:16:46,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:16:46,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:16:46,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:16:46,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:16:46,081 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 00:16:48,164 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:16:48,324 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-03-20 00:16:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:16:48,325 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-03-20 00:16:48,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:16:48,327 INFO L225 Difference]: With dead ends: 42 [2022-03-20 00:16:48,327 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 00:16:48,327 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-20 00:16:48,328 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:16:48,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 109 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 00:16:48,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 00:16:48,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-20 00:16:48,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 00:16:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-03-20 00:16:48,335 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 26 [2022-03-20 00:16:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:16:48,336 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-03-20 00:16:48,336 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 00:16:48,336 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-03-20 00:16:48,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 00:16:48,337 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:16:48,337 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:16:48,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 00:16:48,537 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:16:48,538 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:16:48,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:16:48,539 INFO L85 PathProgramCache]: Analyzing trace with hash -193375877, now seen corresponding path program 1 times [2022-03-20 00:16:48,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:16:48,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352078730] [2022-03-20 00:16:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:48,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:16:48,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:16:48,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975575003] [2022-03-20 00:16:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:48,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:16:48,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:16:48,567 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) [2022-03-20 00:16:48,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 00:16:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:16:48,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:16:48,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:16:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:16:48,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:16:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:16:48,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:16:48,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352078730] [2022-03-20 00:16:48,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:16:48,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975575003] [2022-03-20 00:16:48,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975575003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:16:48,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:16:48,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 00:16:48,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706619265] [2022-03-20 00:16:48,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:16:48,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 00:16:48,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:16:48,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 00:16:48,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 00:16:48,845 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 00:16:48,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:16:48,966 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-03-20 00:16:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 00:16:48,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2022-03-20 00:16:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:16:48,969 INFO L225 Difference]: With dead ends: 73 [2022-03-20 00:16:48,969 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 00:16:48,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:16:48,971 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:16:48,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 122 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:16:48,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 00:16:48,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2022-03-20 00:16:48,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 00:16:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-03-20 00:16:48,979 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 28 [2022-03-20 00:16:48,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:16:48,979 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-03-20 00:16:48,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 00:16:48,979 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-03-20 00:16:48,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 00:16:48,980 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:16:48,980 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:16:49,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 00:16:49,197 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:16:49,199 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:16:49,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:16:49,200 INFO L85 PathProgramCache]: Analyzing trace with hash -2031725334, now seen corresponding path program 1 times [2022-03-20 00:16:49,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:16:49,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818176105] [2022-03-20 00:16:49,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:49,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:16:49,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:16:49,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244755317] [2022-03-20 00:16:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:49,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:16:49,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:16:49,223 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) [2022-03-20 00:16:49,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 00:16:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:16:49,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 00:16:49,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:16:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:16:49,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:16:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:16:49,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:16:49,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818176105] [2022-03-20 00:16:49,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:16:49,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244755317] [2022-03-20 00:16:49,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244755317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:16:49,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:16:49,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 00:16:49,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023377017] [2022-03-20 00:16:49,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:16:49,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 00:16:49,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:16:49,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 00:16:49,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:16:49,572 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 00:16:49,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:16:49,727 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2022-03-20 00:16:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 00:16:49,728 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2022-03-20 00:16:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:16:49,729 INFO L225 Difference]: With dead ends: 98 [2022-03-20 00:16:49,729 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 00:16:49,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:16:49,731 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 83 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:16:49,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 184 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:16:49,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 00:16:49,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2022-03-20 00:16:49,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 67 states have internal predecessors, (85), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 00:16:49,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2022-03-20 00:16:49,749 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 29 [2022-03-20 00:16:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:16:49,751 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2022-03-20 00:16:49,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 00:16:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2022-03-20 00:16:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 00:16:49,753 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:16:49,753 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:16:49,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 00:16:49,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:16:49,975 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:16:49,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:16:49,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2029937874, now seen corresponding path program 1 times [2022-03-20 00:16:49,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:16:49,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361156210] [2022-03-20 00:16:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:49,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:16:49,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:16:49,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317621268] [2022-03-20 00:16:49,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:49,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:16:49,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:16:50,001 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) [2022-03-20 00:16:50,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 00:16:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:16:50,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 00:16:50,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:16:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 00:16:50,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:16:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:16:50,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:16:50,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361156210] [2022-03-20 00:16:50,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:16:50,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317621268] [2022-03-20 00:16:50,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317621268] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:16:50,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:16:50,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-20 00:16:50,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529161547] [2022-03-20 00:16:50,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:16:50,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:16:50,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:16:50,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:16:50,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:16:50,666 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 00:16:50,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:16:50,713 INFO L93 Difference]: Finished difference Result 117 states and 143 transitions. [2022-03-20 00:16:50,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:16:50,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-03-20 00:16:50,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:16:50,717 INFO L225 Difference]: With dead ends: 117 [2022-03-20 00:16:50,718 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 00:16:50,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-20 00:16:50,721 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:16:50,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 135 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-03-20 00:16:50,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 00:16:50,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-03-20 00:16:50,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 93 states have internal predecessors, (108), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (12), 8 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 00:16:50,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-03-20 00:16:50,734 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 29 [2022-03-20 00:16:50,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:16:50,734 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-03-20 00:16:50,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 00:16:50,734 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-03-20 00:16:50,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 00:16:50,741 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:16:50,741 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:16:50,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 00:16:50,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:16:50,960 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:16:50,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:16:50,960 INFO L85 PathProgramCache]: Analyzing trace with hash 223058363, now seen corresponding path program 1 times [2022-03-20 00:16:50,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:16:50,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678687566] [2022-03-20 00:16:50,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:50,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:16:50,979 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:16:50,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935731597] [2022-03-20 00:16:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:50,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:16:50,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:16:50,981 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) [2022-03-20 00:16:50,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 00:16:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:16:51,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 00:16:51,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:16:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 00:16:51,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:16:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 00:16:51,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:16:51,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678687566] [2022-03-20 00:16:51,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:16:51,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935731597] [2022-03-20 00:16:51,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935731597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:16:51,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:16:51,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-20 00:16:51,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744278777] [2022-03-20 00:16:51,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:16:51,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 00:16:51,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:16:51,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 00:16:51,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 00:16:51,296 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 00:16:51,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:16:51,468 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2022-03-20 00:16:51,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 00:16:51,469 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-03-20 00:16:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:16:51,470 INFO L225 Difference]: With dead ends: 133 [2022-03-20 00:16:51,470 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 00:16:51,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:16:51,472 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:16:51,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 123 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:16:51,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 00:16:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-20 00:16:51,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 85 states have (on average 1.223529411764706) internal successors, (104), 90 states have internal predecessors, (104), 14 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (12), 8 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 00:16:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2022-03-20 00:16:51,485 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 35 [2022-03-20 00:16:51,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:16:51,485 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2022-03-20 00:16:51,485 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 00:16:51,485 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2022-03-20 00:16:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 00:16:51,487 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:16:51,487 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-03-20 00:16:51,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 00:16:51,705 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:16:51,705 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:16:51,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:16:51,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1731935178, now seen corresponding path program 1 times [2022-03-20 00:16:51,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:16:51,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300185251] [2022-03-20 00:16:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:51,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:16:51,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:16:51,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851278900] [2022-03-20 00:16:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:51,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:16:51,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:16:51,730 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) [2022-03-20 00:16:51,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 00:16:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:16:51,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 00:16:51,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:16:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:16:51,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:16:51,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:16:51,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300185251] [2022-03-20 00:16:51,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:16:51,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851278900] [2022-03-20 00:16:51,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851278900] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:16:51,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:16:51,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 00:16:51,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560592969] [2022-03-20 00:16:51,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:16:51,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 00:16:51,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:16:51,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 00:16:51,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:16:51,846 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 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) [2022-03-20 00:16:53,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 00:16:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:16:53,995 INFO L93 Difference]: Finished difference Result 145 states and 171 transitions. [2022-03-20 00:16:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 00:16:53,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 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 35 [2022-03-20 00:16:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:16:53,996 INFO L225 Difference]: With dead ends: 145 [2022-03-20 00:16:53,996 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 00:16:53,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:16:53,997 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:16:53,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 00:16:53,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 00:16:54,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-03-20 00:16:54,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 77 states have internal predecessors, (89), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 00:16:54,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2022-03-20 00:16:54,007 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 35 [2022-03-20 00:16:54,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:16:54,008 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2022-03-20 00:16:54,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 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) [2022-03-20 00:16:54,008 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2022-03-20 00:16:54,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 00:16:54,009 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:16:54,009 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:16:54,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 00:16:54,231 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,SelfDestructingSolverStorable8 [2022-03-20 00:16:54,232 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:16:54,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:16:54,232 INFO L85 PathProgramCache]: Analyzing trace with hash 817777954, now seen corresponding path program 1 times [2022-03-20 00:16:54,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:16:54,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922336559] [2022-03-20 00:16:54,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:54,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:16:54,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:16:54,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870276407] [2022-03-20 00:16:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:16:54,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:16:54,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:16:54,262 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) [2022-03-20 00:16:54,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process