/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 11:38:50,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 11:38:50,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 11:38:50,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 11:38:50,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 11:38:50,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 11:38:50,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 11:38:50,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 11:38:50,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 11:38:50,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 11:38:50,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 11:38:50,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 11:38:50,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 11:38:50,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 11:38:50,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 11:38:50,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 11:38:50,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 11:38:50,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 11:38:50,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 11:38:50,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 11:38:50,612 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 11:38:50,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 11:38:50,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 11:38:50,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 11:38:50,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 11:38:50,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 11:38:50,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 11:38:50,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 11:38:50,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 11:38:50,630 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 11:38:50,655 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 11:38:50,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 11:38:50,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 11:38:50,657 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 11:38:50,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 11:38:50,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 11:38:50,658 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 11:38:50,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 11:38:50,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 11:38:50,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 11:38:50,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 11:38:50,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 11:38:50,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 11:38:50,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 11:38:50,659 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 11:38:50,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 11:38:50,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 11:38:50,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 11:38:50,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 11:38:50,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 11:38:50,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 11:38:50,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 11:38:50,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 11:38:50,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 11:38:50,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 11:38:50,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 11:38:50,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 11:38:50,661 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 11:38:50,662 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 11:38:50,662 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 11:38:50,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 11:38:50,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 11:38:50,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 11:38:50,904 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 11:38:50,906 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 11:38:50,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c [2022-03-20 11:38:50,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd3fea053/8feb302998c2422b9de2ed5e4ff1f32e/FLAGc4c85ce65 [2022-03-20 11:38:51,304 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 11:38:51,305 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c [2022-03-20 11:38:51,309 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd3fea053/8feb302998c2422b9de2ed5e4ff1f32e/FLAGc4c85ce65 [2022-03-20 11:38:51,318 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd3fea053/8feb302998c2422b9de2ed5e4ff1f32e [2022-03-20 11:38:51,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 11:38:51,321 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 11:38:51,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 11:38:51,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 11:38:51,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 11:38:51,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:38:51" (1/1) ... [2022-03-20 11:38:51,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ffde0e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:38:51, skipping insertion in model container [2022-03-20 11:38:51,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:38:51" (1/1) ... [2022-03-20 11:38:51,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 11:38:51,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 11:38:51,489 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/ps4-ll_unwindbound50.c[458,471] [2022-03-20 11:38:51,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 11:38:51,509 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 11:38:51,517 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/ps4-ll_unwindbound50.c[458,471] [2022-03-20 11:38:51,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 11:38:51,532 INFO L208 MainTranslator]: Completed translation [2022-03-20 11:38:51,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:38:51 WrapperNode [2022-03-20 11:38:51,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 11:38:51,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 11:38:51,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 11:38:51,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 11:38:51,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:38:51" (1/1) ... [2022-03-20 11:38:51,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:38:51" (1/1) ... [2022-03-20 11:38:51,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:38:51" (1/1) ... [2022-03-20 11:38:51,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:38:51" (1/1) ... [2022-03-20 11:38:51,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:38:51" (1/1) ... [2022-03-20 11:38:51,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:38:51" (1/1) ... [2022-03-20 11:38:51,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:38:51" (1/1) ... [2022-03-20 11:38:51,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 11:38:51,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 11:38:51,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 11:38:51,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 11:38:51,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:38:51" (1/1) ... [2022-03-20 11:38:51,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 11:38:51,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:38:51,582 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 11:38:51,589 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 11:38:51,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 11:38:51,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 11:38:51,612 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 11:38:51,612 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 11:38:51,612 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 11:38:51,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 11:38:51,612 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 11:38:51,612 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 11:38:51,613 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 11:38:51,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 11:38:51,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-20 11:38:51,613 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 11:38:51,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 11:38:51,613 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 11:38:51,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 11:38:51,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 11:38:51,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 11:38:51,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 11:38:51,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 11:38:51,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 11:38:51,663 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 11:38:51,665 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 11:38:51,753 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 11:38:51,758 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 11:38:51,758 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 11:38:51,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:38:51 BoogieIcfgContainer [2022-03-20 11:38:51,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 11:38:51,760 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 11:38:51,760 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 11:38:51,762 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 11:38:51,765 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:38:51" (1/1) ... [2022-03-20 11:38:51,780 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 11:38:51,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 11:38:51 BasicIcfg [2022-03-20 11:38:51,798 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 11:38:51,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 11:38:51,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 11:38:51,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 11:38:51,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 11:38:51" (1/4) ... [2022-03-20 11:38:51,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ff2444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:38:51, skipping insertion in model container [2022-03-20 11:38:51,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:38:51" (2/4) ... [2022-03-20 11:38:51,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ff2444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:38:51, skipping insertion in model container [2022-03-20 11:38:51,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:38:51" (3/4) ... [2022-03-20 11:38:51,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ff2444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 11:38:51, skipping insertion in model container [2022-03-20 11:38:51,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 11:38:51" (4/4) ... [2022-03-20 11:38:51,808 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound50.cqvasr [2022-03-20 11:38:51,813 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 11:38:51,813 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 11:38:51,871 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 11:38:51,876 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=FINITE_AUTOMATA, 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 11:38:51,876 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 11:38:51,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 11:38:51,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 11:38:51,893 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:38:51,894 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:38:51,894 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:38:51,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:38:51,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1984627219, now seen corresponding path program 1 times [2022-03-20 11:38:51,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:38:51,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66447963] [2022-03-20 11:38:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:38:51,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:38:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:38:52,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 11:38:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:38:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:38:52,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:38:52,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66447963] [2022-03-20 11:38:52,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66447963] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:38:52,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:38:52,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 11:38:52,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550818762] [2022-03-20 11:38:52,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:38:52,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 11:38:52,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:38:52,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 11:38:52,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 11:38:52,127 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 11:38:52,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:38:52,174 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2022-03-20 11:38:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 11:38:52,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 11:38:52,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:38:52,188 INFO L225 Difference]: With dead ends: 41 [2022-03-20 11:38:52,189 INFO L226 Difference]: Without dead ends: 19 [2022-03-20 11:38:52,192 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 11:38:52,196 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:38:52,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:38:52,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-20 11:38:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-03-20 11:38:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 11:38:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-03-20 11:38:52,223 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2022-03-20 11:38:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:38:52,224 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-03-20 11:38:52,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 11:38:52,224 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-03-20 11:38:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 11:38:52,225 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:38:52,225 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:38:52,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 11:38:52,225 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:38:52,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:38:52,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1423332195, now seen corresponding path program 1 times [2022-03-20 11:38:52,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:38:52,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668241705] [2022-03-20 11:38:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:38:52,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:38:52,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:38:52,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268675982] [2022-03-20 11:38:52,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:38:52,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:38:52,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:38:52,267 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 11:38:52,287 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 11:38:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:38:52,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 11:38:52,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:38:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:38:52,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 11:38:52,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:38:52,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668241705] [2022-03-20 11:38:52,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:38:52,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268675982] [2022-03-20 11:38:52,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268675982] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:38:52,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:38:52,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 11:38:52,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641236255] [2022-03-20 11:38:52,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:38:52,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 11:38:52,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:38:52,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 11:38:52,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 11:38:52,427 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 11:38:52,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:38:52,442 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-03-20 11:38:52,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 11:38:52,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 11:38:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:38:52,452 INFO L225 Difference]: With dead ends: 28 [2022-03-20 11:38:52,452 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 11:38:52,453 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 11:38:52,454 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:38:52,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:38:52,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 11:38:52,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-20 11:38:52,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 11:38:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-03-20 11:38:52,459 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-03-20 11:38:52,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:38:52,460 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-03-20 11:38:52,460 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 11:38:52,460 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-03-20 11:38:52,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 11:38:52,460 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:38:52,461 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:38:52,485 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 11:38:52,675 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 11:38:52,676 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:38:52,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:38:52,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1424404671, now seen corresponding path program 1 times [2022-03-20 11:38:52,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:38:52,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092979475] [2022-03-20 11:38:52,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:38:52,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:38:52,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:38:52,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906544732] [2022-03-20 11:38:52,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:38:52,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:38:52,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:38:52,696 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 11:38:52,697 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 11:38:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:38:52,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 11:38:52,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:38:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:38:52,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 11:38:52,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:38:52,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092979475] [2022-03-20 11:38:52,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:38:52,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906544732] [2022-03-20 11:38:52,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906544732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:38:52,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:38:52,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 11:38:52,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399959564] [2022-03-20 11:38:52,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:38:52,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 11:38:52,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:38:52,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 11:38:52,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 11:38:52,820 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 11:38:52,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:38:52,869 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-03-20 11:38:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 11:38:52,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 11:38:52,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:38:52,870 INFO L225 Difference]: With dead ends: 30 [2022-03-20 11:38:52,870 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 11:38:52,871 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 11:38:52,872 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:38:52,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 71 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:38:52,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 11:38:52,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-20 11:38:52,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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 11:38:52,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-03-20 11:38:52,879 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2022-03-20 11:38:52,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:38:52,879 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-03-20 11:38:52,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 11:38:52,880 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-03-20 11:38:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 11:38:52,880 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:38:52,880 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:38:52,900 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 11:38:53,091 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 11:38:53,092 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:38:53,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:38:53,103 INFO L85 PathProgramCache]: Analyzing trace with hash -381498108, now seen corresponding path program 1 times [2022-03-20 11:38:53,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:38:53,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090266989] [2022-03-20 11:38:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:38:53,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:38:53,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:38:53,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357685707] [2022-03-20 11:38:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:38:53,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:38:53,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:38:53,126 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 11:38:53,153 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 11:38:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:38:53,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 11:38:53,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:38:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:38:53,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:38:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:38:53,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:38:53,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090266989] [2022-03-20 11:38:53,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:38:53,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357685707] [2022-03-20 11:38:53,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357685707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:38:53,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:38:53,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 11:38:53,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735950124] [2022-03-20 11:38:53,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:38:53,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 11:38:53,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:38:53,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 11:38:53,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 11:38:53,366 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 11:38:54,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:38:54,160 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-03-20 11:38:54,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 11:38:54,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2022-03-20 11:38:54,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:38:54,163 INFO L225 Difference]: With dead ends: 60 [2022-03-20 11:38:54,163 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 11:38:54,164 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 11:38:54,164 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 11:38:54,165 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 110 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 11:38:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 11:38:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-03-20 11:38:54,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 11:38:54,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-03-20 11:38:54,176 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 20 [2022-03-20 11:38:54,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:38:54,177 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-03-20 11:38:54,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 11:38:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-03-20 11:38:54,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 11:38:54,177 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:38:54,178 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:38:54,198 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 11:38:54,391 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 11:38:54,392 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:38:54,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:38:54,392 INFO L85 PathProgramCache]: Analyzing trace with hash -380425632, now seen corresponding path program 1 times [2022-03-20 11:38:54,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:38:54,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674086368] [2022-03-20 11:38:54,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:38:54,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:38:54,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:38:54,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786105459] [2022-03-20 11:38:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:38:54,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:38:54,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:38:54,403 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 11:38:54,408 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 11:38:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:38:54,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 11:38:54,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:38:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:38:54,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:38:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 11:38:54,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:38:54,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674086368] [2022-03-20 11:38:54,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:38:54,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786105459] [2022-03-20 11:38:54,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786105459] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 11:38:54,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:38:54,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 11:38:54,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226755285] [2022-03-20 11:38:54,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:38:54,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 11:38:54,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:38:54,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 11:38:54,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 11:38:54,751 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 11:38:54,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:38:54,787 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2022-03-20 11:38:54,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 11:38:54,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 11:38:54,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:38:54,791 INFO L225 Difference]: With dead ends: 62 [2022-03-20 11:38:54,791 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 11:38:54,792 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 11:38:54,794 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:38:54,796 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 59 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:38:54,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 11:38:54,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2022-03-20 11:38:54,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 11:38:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-03-20 11:38:54,811 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 20 [2022-03-20 11:38:54,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:38:54,811 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-03-20 11:38:54,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 11:38:54,812 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-03-20 11:38:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 11:38:54,813 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:38:54,813 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:38:54,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 11:38:55,023 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 11:38:55,023 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:38:55,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:38:55,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1647871298, now seen corresponding path program 1 times [2022-03-20 11:38:55,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:38:55,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529828521] [2022-03-20 11:38:55,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:38:55,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:38:55,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:38:55,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853983417] [2022-03-20 11:38:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:38:55,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:38:55,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:38:55,034 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 11:38:55,071 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 11:38:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:38:55,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 11:38:55,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:38:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 11:38:55,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:12,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:12,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529828521] [2022-03-20 11:39:12,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:12,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853983417] [2022-03-20 11:39:12,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853983417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:12,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:12,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 11:39:12,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496671400] [2022-03-20 11:39:12,017 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:12,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 11:39:12,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:12,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 11:39:12,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=163, Unknown=1, NotChecked=0, Total=210 [2022-03-20 11:39:12,018 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 11:39:12,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:12,127 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-03-20 11:39:12,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 11:39:12,127 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2022-03-20 11:39:12,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:12,128 INFO L225 Difference]: With dead ends: 50 [2022-03-20 11:39:12,128 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 11:39:12,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=67, Invalid=238, Unknown=1, NotChecked=0, Total=306 [2022-03-20 11:39:12,130 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:12,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 113 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:39:12,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 11:39:12,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-20 11:39:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 11:39:12,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-03-20 11:39:12,137 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 26 [2022-03-20 11:39:12,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:12,137 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-03-20 11:39:12,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 11:39:12,137 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-03-20 11:39:12,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 11:39:12,138 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:12,138 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:12,164 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 11:39:12,338 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 11:39:12,339 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:12,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:12,340 INFO L85 PathProgramCache]: Analyzing trace with hash 31133987, now seen corresponding path program 2 times [2022-03-20 11:39:12,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:12,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061063981] [2022-03-20 11:39:12,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:12,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:12,349 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:12,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132545274] [2022-03-20 11:39:12,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:39:12,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:12,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:12,352 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 11:39:12,353 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 11:39:12,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:39:12,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:12,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 11:39:12,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 11:39:12,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:12,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:12,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061063981] [2022-03-20 11:39:12,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:12,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132545274] [2022-03-20 11:39:12,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132545274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:12,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:12,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 11:39:12,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105016411] [2022-03-20 11:39:12,711 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:12,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 11:39:12,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:12,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 11:39:12,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 11:39:12,712 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 11:39:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:12,777 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2022-03-20 11:39:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 11:39:12,778 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2022-03-20 11:39:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:12,778 INFO L225 Difference]: With dead ends: 50 [2022-03-20 11:39:12,779 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 11:39:12,779 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 11:39:12,780 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:12,780 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 152 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:39:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 11:39:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-20 11:39:12,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 11:39:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-03-20 11:39:12,786 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 34 [2022-03-20 11:39:12,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:12,786 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-03-20 11:39:12,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 11:39:12,786 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-03-20 11:39:12,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 11:39:12,790 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:12,790 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:12,815 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 11:39:12,990 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 11:39:12,991 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:12,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1474833412, now seen corresponding path program 3 times [2022-03-20 11:39:12,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:12,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817238742] [2022-03-20 11:39:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:12,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:12,999 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:13,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503216764] [2022-03-20 11:39:13,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:39:13,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:13,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:13,009 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 11:39:13,010 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 11:39:13,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 11:39:13,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:13,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 11:39:13,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 11:39:13,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:13,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:13,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817238742] [2022-03-20 11:39:13,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:13,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503216764] [2022-03-20 11:39:13,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503216764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:13,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:13,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 11:39:13,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7206730] [2022-03-20 11:39:13,436 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:13,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 11:39:13,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:13,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 11:39:13,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 11:39:13,437 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 11:39:13,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:13,531 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-03-20 11:39:13,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 11:39:13,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2022-03-20 11:39:13,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:13,532 INFO L225 Difference]: With dead ends: 52 [2022-03-20 11:39:13,532 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 11:39:13,533 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-20 11:39:13,533 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:13,534 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 198 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:39:13,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 11:39:13,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-20 11:39:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 11:39:13,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-03-20 11:39:13,545 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2022-03-20 11:39:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:13,545 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-03-20 11:39:13,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 11:39:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-03-20 11:39:13,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 11:39:13,546 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:13,547 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:13,573 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 11:39:13,747 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 11:39:13,748 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:13,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:13,748 INFO L85 PathProgramCache]: Analyzing trace with hash 831591399, now seen corresponding path program 2 times [2022-03-20 11:39:13,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:13,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853200320] [2022-03-20 11:39:13,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:13,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:13,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:13,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788231933] [2022-03-20 11:39:13,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:39:13,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:13,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:13,757 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 11:39:13,775 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 11:39:13,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:39:13,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:13,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 11:39:13,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:39:13,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 11:39:14,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:14,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853200320] [2022-03-20 11:39:14,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:14,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788231933] [2022-03-20 11:39:14,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788231933] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:39:14,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:39:14,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 11:39:14,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494052801] [2022-03-20 11:39:14,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:14,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 11:39:14,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:14,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 11:39:14,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 11:39:14,071 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 11:39:14,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:14,236 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2022-03-20 11:39:14,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 11:39:14,236 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 44 [2022-03-20 11:39:14,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:14,237 INFO L225 Difference]: With dead ends: 123 [2022-03-20 11:39:14,237 INFO L226 Difference]: Without dead ends: 118 [2022-03-20 11:39:14,238 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-20 11:39:14,238 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 92 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:14,239 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 148 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:39:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-20 11:39:14,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 93. [2022-03-20 11:39:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 11:39:14,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2022-03-20 11:39:14,250 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 44 [2022-03-20 11:39:14,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:14,250 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2022-03-20 11:39:14,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 11:39:14,250 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2022-03-20 11:39:14,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 11:39:14,251 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:14,251 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:14,280 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 11:39:14,454 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 11:39:14,455 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:14,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:14,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1805593115, now seen corresponding path program 4 times [2022-03-20 11:39:14,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:14,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736957367] [2022-03-20 11:39:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:14,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:14,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:14,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49595769] [2022-03-20 11:39:14,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 11:39:14,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:14,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:14,465 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 11:39:14,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 11:39:14,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 11:39:14,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:14,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 11:39:14,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 11:39:14,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:14,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:14,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736957367] [2022-03-20 11:39:14,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:14,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49595769] [2022-03-20 11:39:14,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49595769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:14,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:14,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 11:39:14,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272339847] [2022-03-20 11:39:14,917 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:14,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 11:39:14,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:14,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 11:39:14,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 11:39:14,918 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 11:39:15,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:15,016 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2022-03-20 11:39:15,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 11:39:15,016 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2022-03-20 11:39:15,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:15,018 INFO L225 Difference]: With dead ends: 98 [2022-03-20 11:39:15,018 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 11:39:15,018 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 11:39:15,019 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:15,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 250 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:39:15,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 11:39:15,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-20 11:39:15,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.088235294117647) internal successors, (74), 68 states have internal predecessors, (74), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 11:39:15,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2022-03-20 11:39:15,028 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 50 [2022-03-20 11:39:15,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:15,029 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2022-03-20 11:39:15,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 11:39:15,029 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2022-03-20 11:39:15,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 11:39:15,030 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:15,030 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:15,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 11:39:15,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 11:39:15,231 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:15,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:15,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1447431878, now seen corresponding path program 5 times [2022-03-20 11:39:15,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:15,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420061154] [2022-03-20 11:39:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:15,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:15,239 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:15,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632983070] [2022-03-20 11:39:15,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 11:39:15,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:15,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:15,241 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:39:15,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 11:39:15,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-20 11:39:15,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:15,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 11:39:15,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 11:39:15,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:15,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:15,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420061154] [2022-03-20 11:39:15,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:15,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632983070] [2022-03-20 11:39:15,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632983070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:15,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:15,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 11:39:15,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051643655] [2022-03-20 11:39:15,866 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:15,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 11:39:15,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:15,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 11:39:15,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 11:39:15,867 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 11:39:15,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:15,981 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-03-20 11:39:15,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 11:39:15,981 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2022-03-20 11:39:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:15,982 INFO L225 Difference]: With dead ends: 98 [2022-03-20 11:39:15,982 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 11:39:15,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 11:39:15,983 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:15,983 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 308 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:39:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 11:39:15,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-20 11:39:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 11:39:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-03-20 11:39:15,992 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 58 [2022-03-20 11:39:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:15,992 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-03-20 11:39:15,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 11:39:15,993 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-03-20 11:39:15,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 11:39:15,993 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:15,993 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:15,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 11:39:16,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 11:39:16,200 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:16,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:16,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1416046937, now seen corresponding path program 6 times [2022-03-20 11:39:16,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:16,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810549522] [2022-03-20 11:39:16,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:16,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:16,208 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:16,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018953654] [2022-03-20 11:39:16,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 11:39:16,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:16,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:16,210 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:39:16,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 11:39:16,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 11:39:16,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:16,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 11:39:16,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 11:39:16,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:17,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:17,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810549522] [2022-03-20 11:39:17,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:17,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018953654] [2022-03-20 11:39:17,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018953654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:17,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:17,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 11:39:17,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833650600] [2022-03-20 11:39:17,048 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:17,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 11:39:17,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:17,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 11:39:17,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-20 11:39:17,049 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 11:39:17,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:17,211 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2022-03-20 11:39:17,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 11:39:17,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 66 [2022-03-20 11:39:17,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:17,213 INFO L225 Difference]: With dead ends: 98 [2022-03-20 11:39:17,213 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 11:39:17,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-20 11:39:17,214 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:17,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 372 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:39:17,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 11:39:17,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-20 11:39:17,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 11:39:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-03-20 11:39:17,224 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 66 [2022-03-20 11:39:17,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:17,224 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-03-20 11:39:17,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 11:39:17,224 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-03-20 11:39:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 11:39:17,225 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:17,225 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:17,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 11:39:17,426 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 11:39:17,426 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:17,427 INFO L85 PathProgramCache]: Analyzing trace with hash 291122568, now seen corresponding path program 7 times [2022-03-20 11:39:17,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:17,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524224548] [2022-03-20 11:39:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:17,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:17,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:17,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849277776] [2022-03-20 11:39:17,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 11:39:17,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:17,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:17,446 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:39:17,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 11:39:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:39:17,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 11:39:17,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 16 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 11:39:18,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:19,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:19,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524224548] [2022-03-20 11:39:19,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:19,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849277776] [2022-03-20 11:39:19,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849277776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:19,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:19,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 11:39:19,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914251079] [2022-03-20 11:39:19,196 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:19,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 11:39:19,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:19,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 11:39:19,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-20 11:39:19,198 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 11:39:19,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:19,377 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2022-03-20 11:39:19,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 11:39:19,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 74 [2022-03-20 11:39:19,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:19,379 INFO L225 Difference]: With dead ends: 98 [2022-03-20 11:39:19,379 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 11:39:19,379 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-20 11:39:19,380 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:19,380 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 442 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:39:19,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 11:39:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-20 11:39:19,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 11:39:19,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-03-20 11:39:19,391 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 74 [2022-03-20 11:39:19,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:19,393 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-03-20 11:39:19,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 11:39:19,394 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-03-20 11:39:19,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 11:39:19,396 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:19,396 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:19,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 11:39:19,602 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 11:39:19,602 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:19,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:19,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1938494313, now seen corresponding path program 8 times [2022-03-20 11:39:19,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:19,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347316104] [2022-03-20 11:39:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:19,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:19,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:19,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899547618] [2022-03-20 11:39:19,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:39:19,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:19,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:19,636 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:39:19,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 11:39:20,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:39:20,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:20,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 11:39:20,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 18 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 11:39:20,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:20,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:20,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347316104] [2022-03-20 11:39:20,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:20,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899547618] [2022-03-20 11:39:20,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899547618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:20,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:20,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 11:39:20,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95876012] [2022-03-20 11:39:20,602 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:20,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 11:39:20,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:20,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 11:39:20,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-20 11:39:20,603 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 11:39:20,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:20,795 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2022-03-20 11:39:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 11:39:20,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 82 [2022-03-20 11:39:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:20,796 INFO L225 Difference]: With dead ends: 98 [2022-03-20 11:39:20,796 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 11:39:20,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-20 11:39:20,797 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:20,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 518 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 11:39:20,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 11:39:20,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-20 11:39:20,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 11:39:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-03-20 11:39:20,804 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 82 [2022-03-20 11:39:20,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:20,804 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-03-20 11:39:20,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 11:39:20,805 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-03-20 11:39:20,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 11:39:20,810 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:20,810 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:20,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 11:39:21,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 11:39:21,020 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:21,020 INFO L85 PathProgramCache]: Analyzing trace with hash 757893194, now seen corresponding path program 9 times [2022-03-20 11:39:21,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:21,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371311977] [2022-03-20 11:39:21,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:21,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:21,027 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:21,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601345877] [2022-03-20 11:39:21,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:39:21,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:21,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:21,029 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:39:21,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 11:39:21,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-20 11:39:21,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:21,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 11:39:21,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 66 proven. 182 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-20 11:39:21,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:43,447 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= (mod (+ (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 13) c_main_~y~0 c_main_~y~0) (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0))) is different from false [2022-03-20 11:39:43,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:43,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371311977] [2022-03-20 11:39:43,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:43,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601345877] [2022-03-20 11:39:43,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601345877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:43,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:43,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-20 11:39:43,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619722659] [2022-03-20 11:39:43,450 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:43,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 11:39:43,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:43,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 11:39:43,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=475, Unknown=5, NotChecked=44, Total=600 [2022-03-20 11:39:43,451 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 11:39:43,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:43,790 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-03-20 11:39:43,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 11:39:43,791 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 90 [2022-03-20 11:39:43,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:43,792 INFO L225 Difference]: With dead ends: 100 [2022-03-20 11:39:43,792 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 11:39:43,792 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=97, Invalid=604, Unknown=5, NotChecked=50, Total=756 [2022-03-20 11:39:43,793 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:43,793 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 663 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 11:39:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 11:39:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-03-20 11:39:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 11:39:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2022-03-20 11:39:43,802 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2022-03-20 11:39:43,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:43,802 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2022-03-20 11:39:43,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 11:39:43,803 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2022-03-20 11:39:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 11:39:43,803 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:43,804 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:43,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 11:39:44,018 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:44,018 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:44,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:44,018 INFO L85 PathProgramCache]: Analyzing trace with hash -953190739, now seen corresponding path program 3 times [2022-03-20 11:39:44,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:44,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045098416] [2022-03-20 11:39:44,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:44,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:44,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:44,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023236315] [2022-03-20 11:39:44,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:39:44,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:44,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:44,026 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:39:44,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 11:39:44,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-20 11:39:44,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:44,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 11:39:44,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:39:44,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 11:39:44,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:44,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045098416] [2022-03-20 11:39:44,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:44,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023236315] [2022-03-20 11:39:44,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023236315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:39:44,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:39:44,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 11:39:44,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734909806] [2022-03-20 11:39:44,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:44,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 11:39:44,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:44,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 11:39:44,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 11:39:44,646 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 11:39:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:45,115 INFO L93 Difference]: Finished difference Result 249 states and 261 transitions. [2022-03-20 11:39:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 11:39:45,116 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) Word has length 92 [2022-03-20 11:39:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:45,117 INFO L225 Difference]: With dead ends: 249 [2022-03-20 11:39:45,117 INFO L226 Difference]: Without dead ends: 244 [2022-03-20 11:39:45,118 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 11:39:45,119 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 340 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:45,119 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 253 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 11:39:45,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-20 11:39:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 189. [2022-03-20 11:39:45,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0928571428571427) internal successors, (153), 140 states have internal predecessors, (153), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 11:39:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 201 transitions. [2022-03-20 11:39:45,132 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 201 transitions. Word has length 92 [2022-03-20 11:39:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:45,132 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 201 transitions. [2022-03-20 11:39:45,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 11:39:45,133 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 201 transitions. [2022-03-20 11:39:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 11:39:45,134 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:45,134 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:45,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 11:39:45,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 11:39:45,347 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:45,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:45,348 INFO L85 PathProgramCache]: Analyzing trace with hash 138382379, now seen corresponding path program 10 times [2022-03-20 11:39:45,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:45,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684704594] [2022-03-20 11:39:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:45,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:45,355 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:45,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381902880] [2022-03-20 11:39:45,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 11:39:45,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:45,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:45,357 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:39:45,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 11:39:46,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 11:39:46,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:46,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 11:39:46,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 22 proven. 220 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 11:39:46,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:47,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:47,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684704594] [2022-03-20 11:39:47,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:47,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381902880] [2022-03-20 11:39:47,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381902880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:47,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:47,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 11:39:47,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324382546] [2022-03-20 11:39:47,056 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:47,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 11:39:47,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:47,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 11:39:47,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-20 11:39:47,057 INFO L87 Difference]: Start difference. First operand 189 states and 201 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 11:39:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:47,282 INFO L93 Difference]: Finished difference Result 194 states and 205 transitions. [2022-03-20 11:39:47,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 11:39:47,282 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 98 [2022-03-20 11:39:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:47,284 INFO L225 Difference]: With dead ends: 194 [2022-03-20 11:39:47,284 INFO L226 Difference]: Without dead ends: 189 [2022-03-20 11:39:47,284 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 11:39:47,285 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:47,285 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 688 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 11:39:47,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-20 11:39:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-03-20 11:39:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0857142857142856) internal successors, (152), 140 states have internal predecessors, (152), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 11:39:47,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 200 transitions. [2022-03-20 11:39:47,296 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 200 transitions. Word has length 98 [2022-03-20 11:39:47,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:47,296 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 200 transitions. [2022-03-20 11:39:47,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 11:39:47,297 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 200 transitions. [2022-03-20 11:39:47,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-20 11:39:47,297 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:47,297 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:47,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 11:39:47,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 11:39:47,503 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:47,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:47,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1036328716, now seen corresponding path program 11 times [2022-03-20 11:39:47,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:47,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962630036] [2022-03-20 11:39:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:47,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:47,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:47,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944740785] [2022-03-20 11:39:47,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 11:39:47,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:47,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:47,515 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:39:47,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 11:39:48,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-20 11:39:48,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:48,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 11:39:48,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 24 proven. 264 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 11:39:48,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:48,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:48,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962630036] [2022-03-20 11:39:48,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:48,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944740785] [2022-03-20 11:39:48,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944740785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:48,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:48,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 11:39:48,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900873756] [2022-03-20 11:39:48,608 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:48,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 11:39:48,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:48,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 11:39:48,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-20 11:39:48,609 INFO L87 Difference]: Start difference. First operand 189 states and 200 transitions. Second operand has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 11:39:48,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:48,860 INFO L93 Difference]: Finished difference Result 194 states and 204 transitions. [2022-03-20 11:39:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 11:39:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 106 [2022-03-20 11:39:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:48,862 INFO L225 Difference]: With dead ends: 194 [2022-03-20 11:39:48,862 INFO L226 Difference]: Without dead ends: 189 [2022-03-20 11:39:48,862 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-20 11:39:48,863 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:48,863 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 782 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 11:39:48,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-20 11:39:48,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-03-20 11:39:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0785714285714285) internal successors, (151), 140 states have internal predecessors, (151), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 11:39:48,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 199 transitions. [2022-03-20 11:39:48,874 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 199 transitions. Word has length 106 [2022-03-20 11:39:48,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:48,875 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 199 transitions. [2022-03-20 11:39:48,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 11:39:48,875 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 199 transitions. [2022-03-20 11:39:48,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 11:39:48,876 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:48,876 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:48,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 11:39:49,082 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 11:39:49,082 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:49,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:49,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1975402733, now seen corresponding path program 12 times [2022-03-20 11:39:49,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:49,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251690388] [2022-03-20 11:39:49,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:49,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:49,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:49,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733547169] [2022-03-20 11:39:49,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 11:39:49,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:49,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:49,099 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:39:49,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 11:39:49,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 11:39:49,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:49,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 11:39:49,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 26 proven. 312 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 11:39:50,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:50,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:50,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251690388] [2022-03-20 11:39:50,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:50,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733547169] [2022-03-20 11:39:50,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733547169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:50,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:50,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 11:39:50,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727469105] [2022-03-20 11:39:50,155 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:50,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 11:39:50,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:50,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 11:39:50,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-20 11:39:50,156 INFO L87 Difference]: Start difference. First operand 189 states and 199 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 11:39:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:50,418 INFO L93 Difference]: Finished difference Result 194 states and 203 transitions. [2022-03-20 11:39:50,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 11:39:50,420 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 114 [2022-03-20 11:39:50,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:50,421 INFO L225 Difference]: With dead ends: 194 [2022-03-20 11:39:50,421 INFO L226 Difference]: Without dead ends: 189 [2022-03-20 11:39:50,421 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-20 11:39:50,422 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 2 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:50,422 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 882 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 11:39:50,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-20 11:39:50,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-03-20 11:39:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0714285714285714) internal successors, (150), 140 states have internal predecessors, (150), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 11:39:50,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 198 transitions. [2022-03-20 11:39:50,434 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 198 transitions. Word has length 114 [2022-03-20 11:39:50,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:50,434 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 198 transitions. [2022-03-20 11:39:50,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 11:39:50,434 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 198 transitions. [2022-03-20 11:39:50,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 11:39:50,435 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:50,436 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:50,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 11:39:50,641 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:50,641 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:50,641 INFO L85 PathProgramCache]: Analyzing trace with hash -953421362, now seen corresponding path program 13 times [2022-03-20 11:39:50,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:50,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255732616] [2022-03-20 11:39:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:50,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:50,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:50,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131499483] [2022-03-20 11:39:50,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 11:39:50,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:50,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:50,649 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:39:50,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 11:39:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:39:51,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 11:39:51,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 66 proven. 365 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-20 11:39:52,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:56,295 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= (mod (+ (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0))) is different from false [2022-03-20 11:39:58,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:58,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255732616] [2022-03-20 11:39:58,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:58,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131499483] [2022-03-20 11:39:58,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131499483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:58,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:58,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-20 11:39:58,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140150619] [2022-03-20 11:39:58,313 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:58,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 11:39:58,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:58,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 11:39:58,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=539, Unknown=1, NotChecked=46, Total=650 [2022-03-20 11:39:58,314 INFO L87 Difference]: Start difference. First operand 189 states and 198 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 11:39:58,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:58,672 INFO L93 Difference]: Finished difference Result 194 states and 202 transitions. [2022-03-20 11:39:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 11:39:58,673 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 122 [2022-03-20 11:39:58,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:58,674 INFO L225 Difference]: With dead ends: 194 [2022-03-20 11:39:58,674 INFO L226 Difference]: Without dead ends: 189 [2022-03-20 11:39:58,674 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=84, Invalid=675, Unknown=1, NotChecked=52, Total=812 [2022-03-20 11:39:58,675 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 7 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:58,675 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 929 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 11:39:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-20 11:39:58,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-03-20 11:39:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0642857142857143) internal successors, (149), 140 states have internal predecessors, (149), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 11:39:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 197 transitions. [2022-03-20 11:39:58,687 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 197 transitions. Word has length 122 [2022-03-20 11:39:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:58,687 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 197 transitions. [2022-03-20 11:39:58,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 11:39:58,687 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 197 transitions. [2022-03-20 11:39:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-20 11:39:58,688 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:58,688 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:58,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-20 11:39:58,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:58,895 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:58,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:58,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1206963793, now seen corresponding path program 14 times [2022-03-20 11:39:58,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:58,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679262217] [2022-03-20 11:39:58,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:58,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:58,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:58,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413428017] [2022-03-20 11:39:58,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:39:58,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:58,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:58,902 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:39:58,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 11:39:59,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:39:59,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:59,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 11:39:59,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:40:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 30 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 11:40:00,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:40:00,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:40:00,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679262217] [2022-03-20 11:40:00,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:40:00,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413428017] [2022-03-20 11:40:00,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413428017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:40:00,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:40:00,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 11:40:00,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393537623] [2022-03-20 11:40:00,362 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:40:00,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 11:40:00,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:40:00,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 11:40:00,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-20 11:40:00,363 INFO L87 Difference]: Start difference. First operand 189 states and 197 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 11:40:00,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:40:00,729 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2022-03-20 11:40:00,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 11:40:00,729 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 130 [2022-03-20 11:40:00,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:40:00,730 INFO L225 Difference]: With dead ends: 194 [2022-03-20 11:40:00,730 INFO L226 Difference]: Without dead ends: 189 [2022-03-20 11:40:00,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-20 11:40:00,731 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 2 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 11:40:00,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1100 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 11:40:00,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-20 11:40:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-03-20 11:40:00,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0571428571428572) internal successors, (148), 140 states have internal predecessors, (148), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 11:40:00,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 196 transitions. [2022-03-20 11:40:00,744 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 196 transitions. Word has length 130 [2022-03-20 11:40:00,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:40:00,744 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 196 transitions. [2022-03-20 11:40:00,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 11:40:00,745 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 196 transitions. [2022-03-20 11:40:00,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 11:40:00,746 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:40:00,746 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:40:00,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 11:40:00,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 11:40:00,958 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:40:00,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:40:00,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1030291600, now seen corresponding path program 15 times [2022-03-20 11:40:00,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:40:00,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107125074] [2022-03-20 11:40:00,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:40:00,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:40:00,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:40:00,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065028088] [2022-03-20 11:40:00,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:40:00,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:40:00,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:40:00,966 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:40:00,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 11:40:01,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-20 11:40:01,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:40:01,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 11:40:01,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:40:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 32 proven. 480 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 11:40:02,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:40:02,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:40:02,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107125074] [2022-03-20 11:40:02,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:40:02,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065028088] [2022-03-20 11:40:02,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065028088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:40:02,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:40:02,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-20 11:40:02,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670443602] [2022-03-20 11:40:02,281 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:40:02,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 11:40:02,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:40:02,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 11:40:02,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-03-20 11:40:02,282 INFO L87 Difference]: Start difference. First operand 189 states and 196 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 18 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 11:40:02,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:40:02,650 INFO L93 Difference]: Finished difference Result 194 states and 200 transitions. [2022-03-20 11:40:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 11:40:02,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 18 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 138 [2022-03-20 11:40:02,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:40:02,652 INFO L225 Difference]: With dead ends: 194 [2022-03-20 11:40:02,652 INFO L226 Difference]: Without dead ends: 189 [2022-03-20 11:40:02,653 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-03-20 11:40:02,653 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 2 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 11:40:02,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1218 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 11:40:02,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-20 11:40:02,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-03-20 11:40:02,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.05) internal successors, (147), 140 states have internal predecessors, (147), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 11:40:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 195 transitions. [2022-03-20 11:40:02,666 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 195 transitions. Word has length 138 [2022-03-20 11:40:02,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:40:02,666 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 195 transitions. [2022-03-20 11:40:02,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 18 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 11:40:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 195 transitions. [2022-03-20 11:40:02,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 11:40:02,667 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:40:02,668 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:40:02,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 11:40:02,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 11:40:02,875 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:40:02,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:40:02,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1153802639, now seen corresponding path program 16 times [2022-03-20 11:40:02,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:40:02,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494186469] [2022-03-20 11:40:02,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:40:02,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:40:02,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:40:02,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645806861] [2022-03-20 11:40:02,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 11:40:02,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:40:02,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:40:02,883 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:40:02,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 11:40:03,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 11:40:03,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:40:03,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-20 11:40:03,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:40:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 34 proven. 544 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 11:40:04,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:40:04,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:40:04,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494186469] [2022-03-20 11:40:04,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:40:04,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645806861] [2022-03-20 11:40:04,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645806861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:40:04,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:40:04,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-20 11:40:04,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506969821] [2022-03-20 11:40:04,489 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:40:04,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 11:40:04,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:40:04,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 11:40:04,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-20 11:40:04,490 INFO L87 Difference]: Start difference. First operand 189 states and 195 transitions. Second operand has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 11:40:04,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:40:04,907 INFO L93 Difference]: Finished difference Result 194 states and 199 transitions. [2022-03-20 11:40:04,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 11:40:04,907 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 146 [2022-03-20 11:40:04,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:40:04,908 INFO L225 Difference]: With dead ends: 194 [2022-03-20 11:40:04,908 INFO L226 Difference]: Without dead ends: 189 [2022-03-20 11:40:04,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-20 11:40:04,909 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 11:40:04,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1342 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 11:40:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-20 11:40:04,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-03-20 11:40:04,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.042857142857143) internal successors, (146), 140 states have internal predecessors, (146), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 11:40:04,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 194 transitions. [2022-03-20 11:40:04,922 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 194 transitions. Word has length 146 [2022-03-20 11:40:04,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:40:04,922 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 194 transitions. [2022-03-20 11:40:04,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 11:40:04,922 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 194 transitions. [2022-03-20 11:40:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-20 11:40:04,923 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:40:04,924 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:40:04,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 11:40:05,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:40:05,131 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:40:05,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:40:05,131 INFO L85 PathProgramCache]: Analyzing trace with hash 75778898, now seen corresponding path program 17 times [2022-03-20 11:40:05,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:40:05,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815468047] [2022-03-20 11:40:05,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:40:05,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:40:05,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:40:05,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824436728] [2022-03-20 11:40:05,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 11:40:05,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:40:05,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:40:05,145 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:40:05,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process