/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/egcd2-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 07:38:00,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 07:38:00,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 07:38:00,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 07:38:00,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 07:38:00,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 07:38:00,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 07:38:00,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 07:38:00,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 07:38:00,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 07:38:00,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 07:38:00,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 07:38:00,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 07:38:00,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 07:38:00,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 07:38:00,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 07:38:00,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 07:38:00,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 07:38:00,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 07:38:00,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 07:38:00,160 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 07:38:00,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 07:38:00,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 07:38:00,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 07:38:00,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 07:38:00,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 07:38:00,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 07:38:00,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 07:38:00,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 07:38:00,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 07:38:00,202 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 07:38:00,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 07:38:00,203 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 07:38:00,203 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 07:38:00,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 07:38:00,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 07:38:00,204 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 07:38:00,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 07:38:00,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 07:38:00,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 07:38:00,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 07:38:00,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 07:38:00,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 07:38:00,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 07:38:00,205 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 07:38:00,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 07:38:00,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 07:38:00,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 07:38:00,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 07:38:00,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 07:38:00,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 07:38:00,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 07:38:00,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 07:38:00,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 07:38:00,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 07:38:00,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 07:38:00,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 07:38:00,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 07:38:00,208 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 07:38:00,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 07:38:00,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 07:38:00,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 07:38:00,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 07:38:00,408 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 07:38:00,409 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 07:38:00,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c [2022-04-05 07:38:00,452 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dad8e5e79/6af5ce0f92b848548f7c0bb0fb818b87/FLAG63f4606c2 [2022-04-05 07:38:00,850 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 07:38:00,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c [2022-04-05 07:38:00,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dad8e5e79/6af5ce0f92b848548f7c0bb0fb818b87/FLAG63f4606c2 [2022-04-05 07:38:00,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dad8e5e79/6af5ce0f92b848548f7c0bb0fb818b87 [2022-04-05 07:38:00,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 07:38:00,875 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 07:38:00,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 07:38:00,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 07:38:00,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 07:38:00,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:38:00" (1/1) ... [2022-04-05 07:38:00,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b76f3a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:38:00, skipping insertion in model container [2022-04-05 07:38:00,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:38:00" (1/1) ... [2022-04-05 07:38:00,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 07:38:00,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 07:38:01,071 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/egcd2-ll_valuebound5.c[490,503] [2022-04-05 07:38:01,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 07:38:01,109 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 07:38:01,119 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/egcd2-ll_valuebound5.c[490,503] [2022-04-05 07:38:01,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 07:38:01,148 INFO L208 MainTranslator]: Completed translation [2022-04-05 07:38:01,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:38:01 WrapperNode [2022-04-05 07:38:01,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 07:38:01,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 07:38:01,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 07:38:01,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 07:38:01,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:38:01" (1/1) ... [2022-04-05 07:38:01,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:38:01" (1/1) ... [2022-04-05 07:38:01,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:38:01" (1/1) ... [2022-04-05 07:38:01,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:38:01" (1/1) ... [2022-04-05 07:38:01,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:38:01" (1/1) ... [2022-04-05 07:38:01,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:38:01" (1/1) ... [2022-04-05 07:38:01,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:38:01" (1/1) ... [2022-04-05 07:38:01,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 07:38:01,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 07:38:01,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 07:38:01,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 07:38:01,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:38:01" (1/1) ... [2022-04-05 07:38:01,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 07:38:01,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:01,220 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) [2022-04-05 07:38:01,237 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 [2022-04-05 07:38:01,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 07:38:01,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 07:38:01,251 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 07:38:01,251 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 07:38:01,252 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 07:38:01,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 07:38:01,252 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 07:38:01,253 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 07:38:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 07:38:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 07:38:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 07:38:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 07:38:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 07:38:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 07:38:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 07:38:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 07:38:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 07:38:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 07:38:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 07:38:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 07:38:01,309 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 07:38:01,310 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 07:38:01,484 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 07:38:01,488 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 07:38:01,488 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 07:38:01,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:38:01 BoogieIcfgContainer [2022-04-05 07:38:01,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 07:38:01,491 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 07:38:01,491 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 07:38:01,506 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 07:38:01,508 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:38:01" (1/1) ... [2022-04-05 07:38:01,510 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 07:38:01,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:38:01 BasicIcfg [2022-04-05 07:38:01,532 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 07:38:01,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 07:38:01,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 07:38:01,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 07:38:01,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 07:38:00" (1/4) ... [2022-04-05 07:38:01,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c451b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:38:01, skipping insertion in model container [2022-04-05 07:38:01,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:38:01" (2/4) ... [2022-04-05 07:38:01,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c451b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:38:01, skipping insertion in model container [2022-04-05 07:38:01,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:38:01" (3/4) ... [2022-04-05 07:38:01,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c451b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 07:38:01, skipping insertion in model container [2022-04-05 07:38:01,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:38:01" (4/4) ... [2022-04-05 07:38:01,538 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.cqvasr [2022-04-05 07:38:01,541 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 07:38:01,542 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 07:38:01,587 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 07:38:01,594 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 [2022-04-05 07:38:01,594 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 07:38:01,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-05 07:38:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 07:38:01,614 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:01,614 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:01,615 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:01,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:01,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2022-04-05 07:38:01,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:01,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152227453] [2022-04-05 07:38:01,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:01,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:01,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 07:38:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:01,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 07:38:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:01,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 07:38:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:01,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-05 07:38:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:01,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 07:38:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:01,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 07:38:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:01,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 07:38:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 07:38:01,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:38:01,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152227453] [2022-04-05 07:38:01,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152227453] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:38:01,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:38:01,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 07:38:01,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269725995] [2022-04-05 07:38:01,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:38:01,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 07:38:01,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:38:01,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 07:38:01,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:38:01,888 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 07:38:01,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:38:01,988 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-04-05 07:38:01,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 07:38:01,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-04-05 07:38:01,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:38:01,996 INFO L225 Difference]: With dead ends: 73 [2022-04-05 07:38:01,997 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 07:38:02,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:38:02,003 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:38:02,004 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:38:02,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 07:38:02,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-05 07:38:02,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 07:38:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-04-05 07:38:02,044 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-04-05 07:38:02,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:38:02,044 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-04-05 07:38:02,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 07:38:02,045 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-04-05 07:38:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 07:38:02,047 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:02,048 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:02,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 07:38:02,049 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:02,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:02,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2022-04-05 07:38:02,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:02,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205753405] [2022-04-05 07:38:02,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:02,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:02,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:38:02,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267242959] [2022-04-05 07:38:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:02,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:02,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:02,091 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) [2022-04-05 07:38:02,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 07:38:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:02,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:38:02,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:38:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-05 07:38:02,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:38:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-05 07:38:02,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:38:02,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205753405] [2022-04-05 07:38:02,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:38:02,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267242959] [2022-04-05 07:38:02,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267242959] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:38:02,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:38:02,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-04-05 07:38:02,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030772108] [2022-04-05 07:38:02,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:38:02,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 07:38:02,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:38:02,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 07:38:02,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-05 07:38:02,435 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 07:38:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:38:02,535 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-04-05 07:38:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:38:02,535 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-04-05 07:38:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:38:02,536 INFO L225 Difference]: With dead ends: 52 [2022-04-05 07:38:02,537 INFO L226 Difference]: Without dead ends: 44 [2022-04-05 07:38:02,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-05 07:38:02,538 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:38:02,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 152 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:38:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-05 07:38:02,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-04-05 07:38:02,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 07:38:02,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-04-05 07:38:02,545 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-04-05 07:38:02,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:38:02,546 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-04-05 07:38:02,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 07:38:02,546 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-04-05 07:38:02,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-05 07:38:02,547 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:02,547 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:02,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 07:38:02,759 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 [2022-04-05 07:38:02,760 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:02,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:02,762 INFO L85 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2022-04-05 07:38:02,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:02,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960763647] [2022-04-05 07:38:02,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:02,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:02,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:38:02,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511374709] [2022-04-05 07:38:02,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:02,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:02,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:02,774 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) [2022-04-05 07:38:02,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 07:38:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:02,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 07:38:02,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:38:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-05 07:38:02,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:38:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 07:38:03,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:38:03,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960763647] [2022-04-05 07:38:03,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:38:03,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511374709] [2022-04-05 07:38:03,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511374709] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 07:38:03,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:38:03,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-05 07:38:03,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640413854] [2022-04-05 07:38:03,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:38:03,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:38:03,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:38:03,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:38:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:38:03,107 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-05 07:38:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:38:03,148 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-04-05 07:38:03,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:38:03,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-04-05 07:38:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:38:03,149 INFO L225 Difference]: With dead ends: 43 [2022-04-05 07:38:03,149 INFO L226 Difference]: Without dead ends: 41 [2022-04-05 07:38:03,150 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:38:03,150 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:38:03,151 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 137 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:38:03,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-05 07:38:03,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-04-05 07:38:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 07:38:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-04-05 07:38:03,156 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-04-05 07:38:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:38:03,157 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-04-05 07:38:03,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-05 07:38:03,157 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-04-05 07:38:03,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-05 07:38:03,158 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:03,158 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:03,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 07:38:03,363 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 [2022-04-05 07:38:03,364 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:03,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:03,364 INFO L85 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2022-04-05 07:38:03,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:03,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425528649] [2022-04-05 07:38:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:03,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:03,375 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:38:03,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885647907] [2022-04-05 07:38:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:03,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:03,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:03,377 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) [2022-04-05 07:38:03,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 07:38:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:03,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 07:38:03,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:38:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-05 07:38:03,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:38:03,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:38:03,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425528649] [2022-04-05 07:38:03,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:38:03,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885647907] [2022-04-05 07:38:03,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885647907] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 07:38:03,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:38:03,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-05 07:38:03,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072934627] [2022-04-05 07:38:03,707 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 07:38:03,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 07:38:03,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:38:03,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 07:38:03,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:38:03,708 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-05 07:38:03,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:38:03,891 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-04-05 07:38:03,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 07:38:03,894 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-04-05 07:38:03,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:38:03,895 INFO L225 Difference]: With dead ends: 54 [2022-04-05 07:38:03,895 INFO L226 Difference]: Without dead ends: 52 [2022-04-05 07:38:03,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:38:03,895 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:38:03,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 168 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:38:03,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-05 07:38:03,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-04-05 07:38:03,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-05 07:38:03,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-04-05 07:38:03,902 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-04-05 07:38:03,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:38:03,903 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-04-05 07:38:03,903 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-05 07:38:03,903 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-04-05 07:38:03,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 07:38:03,904 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:03,904 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:03,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 07:38:04,118 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 [2022-04-05 07:38:04,119 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:04,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:04,120 INFO L85 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2022-04-05 07:38:04,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:04,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137886304] [2022-04-05 07:38:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:04,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:04,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:38:04,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599277917] [2022-04-05 07:38:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:04,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:04,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:04,136 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) [2022-04-05 07:38:04,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 07:38:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:04,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 07:38:04,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:38:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 07:38:04,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:38:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-05 07:38:04,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:38:04,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137886304] [2022-04-05 07:38:04,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:38:04,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599277917] [2022-04-05 07:38:04,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599277917] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 07:38:04,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:38:04,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-05 07:38:04,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904659626] [2022-04-05 07:38:04,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:38:04,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:38:04,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:38:04,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:38:04,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:38:04,502 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-05 07:38:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:38:04,552 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-04-05 07:38:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:38:04,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-04-05 07:38:04,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:38:04,555 INFO L225 Difference]: With dead ends: 58 [2022-04-05 07:38:04,555 INFO L226 Difference]: Without dead ends: 56 [2022-04-05 07:38:04,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:38:04,557 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:38:04,557 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 149 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:38:04,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-05 07:38:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-04-05 07:38:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-05 07:38:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-04-05 07:38:04,565 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-04-05 07:38:04,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:38:04,566 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-04-05 07:38:04,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-05 07:38:04,566 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-04-05 07:38:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-05 07:38:04,567 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:04,567 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:04,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 07:38:04,778 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 [2022-04-05 07:38:04,778 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:04,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:04,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2022-04-05 07:38:04,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:04,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505578503] [2022-04-05 07:38:04,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:04,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:04,787 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:38:04,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394613289] [2022-04-05 07:38:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:04,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:04,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:04,788 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) [2022-04-05 07:38:04,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 07:38:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:04,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-05 07:38:04,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:38:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-05 07:38:05,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:38:05,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:38:05,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505578503] [2022-04-05 07:38:05,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:38:05,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394613289] [2022-04-05 07:38:05,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394613289] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 07:38:05,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:38:05,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-05 07:38:05,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002498037] [2022-04-05 07:38:05,092 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 07:38:05,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 07:38:05,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:38:05,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 07:38:05,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-05 07:38:05,093 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-05 07:38:05,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:38:05,180 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-04-05 07:38:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 07:38:05,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-04-05 07:38:05,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:38:05,181 INFO L225 Difference]: With dead ends: 62 [2022-04-05 07:38:05,181 INFO L226 Difference]: Without dead ends: 60 [2022-04-05 07:38:05,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:38:05,182 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:38:05,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 138 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:38:05,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-05 07:38:05,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-04-05 07:38:05,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-05 07:38:05,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-04-05 07:38:05,189 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-04-05 07:38:05,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:38:05,189 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-04-05 07:38:05,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-05 07:38:05,189 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-04-05 07:38:05,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-05 07:38:05,190 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:05,190 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:05,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 07:38:05,416 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 [2022-04-05 07:38:05,417 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:05,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:05,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2022-04-05 07:38:05,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:05,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431198424] [2022-04-05 07:38:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:05,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:05,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:38:05,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007230355] [2022-04-05 07:38:05,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:05,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:05,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:05,427 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) [2022-04-05 07:38:05,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 07:38:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:05,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 07:38:05,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:38:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-05 07:38:05,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:38:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-05 07:38:05,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:38:05,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431198424] [2022-04-05 07:38:05,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:38:05,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007230355] [2022-04-05 07:38:05,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007230355] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:38:05,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:38:05,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-05 07:38:05,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278908920] [2022-04-05 07:38:05,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:38:05,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 07:38:05,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:38:05,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 07:38:05,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-05 07:38:05,693 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-05 07:38:05,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:38:05,842 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-04-05 07:38:05,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 07:38:05,843 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-04-05 07:38:05,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:38:05,844 INFO L225 Difference]: With dead ends: 106 [2022-04-05 07:38:05,844 INFO L226 Difference]: Without dead ends: 98 [2022-04-05 07:38:05,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:38:05,844 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:38:05,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 259 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:38:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-05 07:38:05,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-04-05 07:38:05,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-05 07:38:05,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-04-05 07:38:05,856 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-04-05 07:38:05,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:38:05,856 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-04-05 07:38:05,857 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-05 07:38:05,857 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-04-05 07:38:05,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-05 07:38:05,857 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:05,858 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:05,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 07:38:06,071 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 [2022-04-05 07:38:06,072 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:06,072 INFO L85 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2022-04-05 07:38:06,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:06,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450837895] [2022-04-05 07:38:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:06,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:06,080 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:38:06,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54490326] [2022-04-05 07:38:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:06,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:06,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:06,082 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) [2022-04-05 07:38:06,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 07:38:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:06,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 07:38:06,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:38:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-05 07:38:06,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:38:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-05 07:38:06,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:38:06,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450837895] [2022-04-05 07:38:06,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:38:06,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54490326] [2022-04-05 07:38:06,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54490326] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:38:06,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:38:06,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-05 07:38:06,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871661595] [2022-04-05 07:38:06,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:38:06,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 07:38:06,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:38:06,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 07:38:06,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-04-05 07:38:06,420 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-05 07:38:06,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:38:06,693 INFO L93 Difference]: Finished difference Result 132 states and 187 transitions. [2022-04-05 07:38:06,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 07:38:06,694 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2022-04-05 07:38:06,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:38:06,696 INFO L225 Difference]: With dead ends: 132 [2022-04-05 07:38:06,696 INFO L226 Difference]: Without dead ends: 128 [2022-04-05 07:38:06,697 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-04-05 07:38:06,697 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 26 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:38:06,698 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 303 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 07:38:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-05 07:38:06,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-04-05 07:38:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-05 07:38:06,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-04-05 07:38:06,710 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2022-04-05 07:38:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:38:06,710 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-04-05 07:38:06,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-05 07:38:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-04-05 07:38:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-05 07:38:06,711 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:06,711 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:06,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 07:38:06,922 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 [2022-04-05 07:38:06,922 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:06,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:06,923 INFO L85 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2022-04-05 07:38:06,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:06,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479659380] [2022-04-05 07:38:06,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:06,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:06,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:38:06,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256259546] [2022-04-05 07:38:06,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 07:38:06,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:06,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:06,932 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) [2022-04-05 07:38:06,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 07:38:06,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 07:38:06,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:38:06,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-05 07:38:06,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:38:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-05 07:38:07,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:38:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-05 07:38:07,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:38:07,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479659380] [2022-04-05 07:38:07,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:38:07,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256259546] [2022-04-05 07:38:07,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256259546] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:38:07,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:38:07,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-04-05 07:38:07,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566710203] [2022-04-05 07:38:07,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:38:07,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 07:38:07,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:38:07,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 07:38:07,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-04-05 07:38:07,553 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-04-05 07:38:10,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:38:10,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:38:10,377 INFO L93 Difference]: Finished difference Result 128 states and 169 transitions. [2022-04-05 07:38:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-05 07:38:10,377 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2022-04-05 07:38:10,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:38:10,378 INFO L225 Difference]: With dead ends: 128 [2022-04-05 07:38:10,378 INFO L226 Difference]: Without dead ends: 126 [2022-04-05 07:38:10,379 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-04-05 07:38:10,379 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 40 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-05 07:38:10,379 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 213 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-05 07:38:10,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-04-05 07:38:10,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2022-04-05 07:38:10,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-05 07:38:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-04-05 07:38:10,393 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 80 [2022-04-05 07:38:10,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:38:10,394 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-04-05 07:38:10,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-04-05 07:38:10,394 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-04-05 07:38:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-05 07:38:10,395 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:10,395 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:10,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 07:38:10,611 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 [2022-04-05 07:38:10,612 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:10,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:10,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2022-04-05 07:38:10,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:10,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177002219] [2022-04-05 07:38:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:10,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:10,620 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:38:10,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972354606] [2022-04-05 07:38:10,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 07:38:10,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:10,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:10,636 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) [2022-04-05 07:38:10,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 07:38:10,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 07:38:10,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:38:10,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-05 07:38:10,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:38:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-05 07:38:11,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:38:11,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:38:11,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177002219] [2022-04-05 07:38:11,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:38:11,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972354606] [2022-04-05 07:38:11,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972354606] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 07:38:11,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:38:11,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-05 07:38:11,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251749928] [2022-04-05 07:38:11,132 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 07:38:11,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 07:38:11,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:38:11,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 07:38:11,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:38:11,133 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-05 07:38:11,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:38:11,327 INFO L93 Difference]: Finished difference Result 144 states and 181 transitions. [2022-04-05 07:38:11,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 07:38:11,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-04-05 07:38:11,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:38:11,328 INFO L225 Difference]: With dead ends: 144 [2022-04-05 07:38:11,328 INFO L226 Difference]: Without dead ends: 142 [2022-04-05 07:38:11,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:38:11,329 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:38:11,329 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 180 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:38:11,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-05 07:38:11,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-04-05 07:38:11,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 79 states have (on average 1.139240506329114) internal successors, (90), 81 states have internal predecessors, (90), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-05 07:38:11,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2022-04-05 07:38:11,347 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 85 [2022-04-05 07:38:11,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:38:11,347 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2022-04-05 07:38:11,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-05 07:38:11,347 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2022-04-05 07:38:11,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-05 07:38:11,348 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:11,348 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:11,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 07:38:11,549 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 [2022-04-05 07:38:11,549 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:11,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:11,549 INFO L85 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2022-04-05 07:38:11,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:11,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267455677] [2022-04-05 07:38:11,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:11,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:11,557 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:38:11,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092096925] [2022-04-05 07:38:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:11,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:11,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:11,560 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) [2022-04-05 07:38:11,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 07:38:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:11,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-05 07:38:11,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:38:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-05 07:38:11,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:38:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-05 07:38:12,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:38:12,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267455677] [2022-04-05 07:38:12,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:38:12,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092096925] [2022-04-05 07:38:12,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092096925] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:38:12,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:38:12,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-05 07:38:12,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882450402] [2022-04-05 07:38:12,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:38:12,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 07:38:12,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:38:12,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 07:38:12,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:38:12,351 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-05 07:38:14,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:38:14,821 INFO L93 Difference]: Finished difference Result 228 states and 311 transitions. [2022-04-05 07:38:14,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-05 07:38:14,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 91 [2022-04-05 07:38:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:38:14,823 INFO L225 Difference]: With dead ends: 228 [2022-04-05 07:38:14,823 INFO L226 Difference]: Without dead ends: 220 [2022-04-05 07:38:14,823 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-04-05 07:38:14,824 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 53 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-05 07:38:14,824 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 318 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-05 07:38:14,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-04-05 07:38:14,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-04-05 07:38:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 117 states have internal predecessors, (137), 81 states have call successors, (81), 19 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-04-05 07:38:14,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 297 transitions. [2022-04-05 07:38:14,863 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 297 transitions. Word has length 91 [2022-04-05 07:38:14,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:38:14,865 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 297 transitions. [2022-04-05 07:38:14,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-05 07:38:14,865 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 297 transitions. [2022-04-05 07:38:14,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-05 07:38:14,867 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:14,867 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:14,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 07:38:15,083 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 [2022-04-05 07:38:15,083 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:15,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:15,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2022-04-05 07:38:15,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:15,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957464449] [2022-04-05 07:38:15,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:15,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:15,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:38:15,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722766762] [2022-04-05 07:38:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:15,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:15,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:15,105 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) [2022-04-05 07:38:15,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 07:38:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:38:15,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-05 07:38:15,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:38:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-04-05 07:38:15,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:38:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-04-05 07:38:16,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:38:16,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957464449] [2022-04-05 07:38:16,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:38:16,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722766762] [2022-04-05 07:38:16,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722766762] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:38:16,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:38:16,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2022-04-05 07:38:16,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689132004] [2022-04-05 07:38:16,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:38:16,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 07:38:16,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:38:16,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 07:38:16,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-04-05 07:38:16,820 INFO L87 Difference]: Start difference. First operand 216 states and 297 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 10 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 10 states have call predecessors, (31), 9 states have call successors, (31) [2022-04-05 07:38:25,029 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:38:28,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:38:30,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:38:30,536 INFO L93 Difference]: Finished difference Result 280 states and 390 transitions. [2022-04-05 07:38:30,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 07:38:30,536 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 10 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 10 states have call predecessors, (31), 9 states have call successors, (31) Word has length 107 [2022-04-05 07:38:30,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:38:30,538 INFO L225 Difference]: With dead ends: 280 [2022-04-05 07:38:30,538 INFO L226 Difference]: Without dead ends: 278 [2022-04-05 07:38:30,539 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2022-04-05 07:38:30,539 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 62 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 106 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:38:30,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 250 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 623 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2022-04-05 07:38:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-04-05 07:38:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2022-04-05 07:38:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 149 states have (on average 1.1812080536912752) internal successors, (176), 153 states have internal predecessors, (176), 105 states have call successors, (105), 20 states have call predecessors, (105), 19 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-04-05 07:38:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 384 transitions. [2022-04-05 07:38:30,594 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 384 transitions. Word has length 107 [2022-04-05 07:38:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:38:30,594 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 384 transitions. [2022-04-05 07:38:30,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 10 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 10 states have call predecessors, (31), 9 states have call successors, (31) [2022-04-05 07:38:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 384 transitions. [2022-04-05 07:38:30,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-05 07:38:30,595 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:30,595 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:30,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 07:38:30,813 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 [2022-04-05 07:38:30,813 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:30,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:30,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1614224774, now seen corresponding path program 2 times [2022-04-05 07:38:30,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:30,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896325983] [2022-04-05 07:38:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:30,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:30,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:38:30,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048107109] [2022-04-05 07:38:30,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 07:38:30,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:30,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:30,829 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) [2022-04-05 07:38:30,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 07:38:30,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 07:38:30,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:38:30,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 07:38:30,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:38:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-04-05 07:38:31,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:38:31,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:38:31,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896325983] [2022-04-05 07:38:31,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:38:31,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048107109] [2022-04-05 07:38:31,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048107109] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:38:31,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:38:31,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:38:31,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881778544] [2022-04-05 07:38:31,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:38:31,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:38:31,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:38:31,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:38:31,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:38:31,022 INFO L87 Difference]: Start difference. First operand 274 states and 384 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-04-05 07:38:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:38:31,121 INFO L93 Difference]: Finished difference Result 360 states and 502 transitions. [2022-04-05 07:38:31,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:38:31,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2022-04-05 07:38:31,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:38:31,124 INFO L225 Difference]: With dead ends: 360 [2022-04-05 07:38:31,124 INFO L226 Difference]: Without dead ends: 236 [2022-04-05 07:38:31,125 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-05 07:38:31,125 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:38:31,125 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 161 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:38:31,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-04-05 07:38:31,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 222. [2022-04-05 07:38:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 121 states have (on average 1.140495867768595) internal successors, (138), 123 states have internal predecessors, (138), 81 states have call successors, (81), 20 states have call predecessors, (81), 19 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2022-04-05 07:38:31,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 298 transitions. [2022-04-05 07:38:31,195 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 298 transitions. Word has length 116 [2022-04-05 07:38:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:38:31,196 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 298 transitions. [2022-04-05 07:38:31,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-04-05 07:38:31,196 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 298 transitions. [2022-04-05 07:38:31,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-05 07:38:31,197 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:31,197 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:31,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 07:38:31,411 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 [2022-04-05 07:38:31,411 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:31,412 INFO L85 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 3 times [2022-04-05 07:38:31,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:31,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779620268] [2022-04-05 07:38:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:31,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:31,419 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:38:31,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649004919] [2022-04-05 07:38:31,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 07:38:31,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:31,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:31,420 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) [2022-04-05 07:38:31,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 07:38:31,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 07:38:31,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:38:31,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-05 07:38:31,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:38:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 67 proven. 53 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-04-05 07:38:32,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:38:32,544 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:38:32,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:38:32,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779620268] [2022-04-05 07:38:32,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:38:32,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649004919] [2022-04-05 07:38:32,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649004919] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 07:38:32,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:38:32,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-04-05 07:38:32,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528130353] [2022-04-05 07:38:32,722 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 07:38:32,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 07:38:32,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:38:32,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 07:38:32,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-04-05 07:38:32,723 INFO L87 Difference]: Start difference. First operand 222 states and 298 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-05 07:38:33,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:38:33,643 INFO L93 Difference]: Finished difference Result 278 states and 369 transitions. [2022-04-05 07:38:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 07:38:33,644 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) Word has length 138 [2022-04-05 07:38:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:38:33,645 INFO L225 Difference]: With dead ends: 278 [2022-04-05 07:38:33,645 INFO L226 Difference]: Without dead ends: 271 [2022-04-05 07:38:33,646 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-04-05 07:38:33,646 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 32 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 07:38:33,646 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 349 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 07:38:33,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-04-05 07:38:33,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 265. [2022-04-05 07:38:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 144 states have (on average 1.1388888888888888) internal successors, (164), 146 states have internal predecessors, (164), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2022-04-05 07:38:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 356 transitions. [2022-04-05 07:38:33,708 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 356 transitions. Word has length 138 [2022-04-05 07:38:33,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:38:33,710 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 356 transitions. [2022-04-05 07:38:33,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-05 07:38:33,711 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 356 transitions. [2022-04-05 07:38:33,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-05 07:38:33,714 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:33,714 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:33,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 07:38:33,927 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 [2022-04-05 07:38:33,927 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:33,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1947214227, now seen corresponding path program 4 times [2022-04-05 07:38:33,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:33,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046706126] [2022-04-05 07:38:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:33,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:33,936 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:38:33,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231285608] [2022-04-05 07:38:33,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 07:38:33,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:33,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:33,938 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) [2022-04-05 07:38:33,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 07:38:33,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 07:38:33,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:38:33,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-05 07:38:33,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:38:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 40 proven. 77 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-04-05 07:38:35,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:38:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 40 proven. 62 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-04-05 07:38:37,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:38:37,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046706126] [2022-04-05 07:38:37,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:38:37,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231285608] [2022-04-05 07:38:37,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231285608] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:38:37,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:38:37,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2022-04-05 07:38:37,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635101488] [2022-04-05 07:38:37,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:38:37,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-05 07:38:37,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:38:37,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-05 07:38:37,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-04-05 07:38:37,524 INFO L87 Difference]: Start difference. First operand 265 states and 356 transitions. Second operand has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 16 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (53), 14 states have call predecessors, (53), 14 states have call successors, (53) [2022-04-05 07:38:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:38:46,479 INFO L93 Difference]: Finished difference Result 474 states and 679 transitions. [2022-04-05 07:38:46,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-05 07:38:46,480 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 16 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (53), 14 states have call predecessors, (53), 14 states have call successors, (53) Word has length 157 [2022-04-05 07:38:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:38:46,482 INFO L225 Difference]: With dead ends: 474 [2022-04-05 07:38:46,482 INFO L226 Difference]: Without dead ends: 385 [2022-04-05 07:38:46,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=634, Invalid=2228, Unknown=0, NotChecked=0, Total=2862 [2022-04-05 07:38:46,486 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 104 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-04-05 07:38:46,486 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 568 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1457 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-04-05 07:38:46,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-04-05 07:38:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 362. [2022-04-05 07:38:46,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 180 states have (on average 1.1833333333333333) internal successors, (213), 182 states have internal predecessors, (213), 157 states have call successors, (157), 25 states have call predecessors, (157), 24 states have return successors, (155), 154 states have call predecessors, (155), 155 states have call successors, (155) [2022-04-05 07:38:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 525 transitions. [2022-04-05 07:38:46,590 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 525 transitions. Word has length 157 [2022-04-05 07:38:46,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:38:46,590 INFO L478 AbstractCegarLoop]: Abstraction has 362 states and 525 transitions. [2022-04-05 07:38:46,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 16 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (53), 14 states have call predecessors, (53), 14 states have call successors, (53) [2022-04-05 07:38:46,591 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 525 transitions. [2022-04-05 07:38:46,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-04-05 07:38:46,592 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:46,592 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:46,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-05 07:38:46,809 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 [2022-04-05 07:38:46,810 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:46,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:46,810 INFO L85 PathProgramCache]: Analyzing trace with hash 915217378, now seen corresponding path program 5 times [2022-04-05 07:38:46,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:46,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794425537] [2022-04-05 07:38:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:46,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:46,818 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:38:46,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289070898] [2022-04-05 07:38:46,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 07:38:46,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:46,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:46,819 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) [2022-04-05 07:38:46,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-05 07:38:46,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-04-05 07:38:46,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:38:46,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-05 07:38:46,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:38:47,939 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:38:48,082 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:38:48,123 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:38:48,168 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:38:48,207 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:38:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 95 proven. 144 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-04-05 07:38:48,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:38:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 86 proven. 129 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2022-04-05 07:38:55,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:38:55,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794425537] [2022-04-05 07:38:55,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:38:55,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289070898] [2022-04-05 07:38:55,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289070898] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:38:55,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:38:55,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 34 [2022-04-05 07:38:55,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373953305] [2022-04-05 07:38:55,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:38:55,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-05 07:38:55,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:38:55,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-05 07:38:55,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2022-04-05 07:38:55,398 INFO L87 Difference]: Start difference. First operand 362 states and 525 transitions. Second operand has 34 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 28 states have internal predecessors, (59), 19 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (52), 17 states have call predecessors, (52), 17 states have call successors, (52) [2022-04-05 07:39:51,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:39:51,011 INFO L93 Difference]: Finished difference Result 495 states and 704 transitions. [2022-04-05 07:39:51,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-05 07:39:51,012 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 28 states have internal predecessors, (59), 19 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (52), 17 states have call predecessors, (52), 17 states have call successors, (52) Word has length 160 [2022-04-05 07:39:51,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:39:51,014 INFO L225 Difference]: With dead ends: 495 [2022-04-05 07:39:51,014 INFO L226 Difference]: Without dead ends: 430 [2022-04-05 07:39:51,016 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 285 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=1050, Invalid=3780, Unknown=0, NotChecked=0, Total=4830 [2022-04-05 07:39:51,016 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 140 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 2037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-04-05 07:39:51,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 377 Invalid, 2037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 1584 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-04-05 07:39:51,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-04-05 07:39:51,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 309. [2022-04-05 07:39:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 162 states have (on average 1.1481481481481481) internal successors, (186), 164 states have internal predecessors, (186), 121 states have call successors, (121), 26 states have call predecessors, (121), 25 states have return successors, (119), 118 states have call predecessors, (119), 119 states have call successors, (119) [2022-04-05 07:39:51,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 426 transitions. [2022-04-05 07:39:51,122 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 426 transitions. Word has length 160 [2022-04-05 07:39:51,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:39:51,123 INFO L478 AbstractCegarLoop]: Abstraction has 309 states and 426 transitions. [2022-04-05 07:39:51,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 28 states have internal predecessors, (59), 19 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (52), 17 states have call predecessors, (52), 17 states have call successors, (52) [2022-04-05 07:39:51,123 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 426 transitions. [2022-04-05 07:39:51,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-04-05 07:39:51,124 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:39:51,124 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:39:51,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-05 07:39:51,339 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 [2022-04-05 07:39:51,339 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:39:51,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:39:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash -970371602, now seen corresponding path program 6 times [2022-04-05 07:39:51,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:39:51,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590768689] [2022-04-05 07:39:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:39:51,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:39:51,347 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:39:51,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269031635] [2022-04-05 07:39:51,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 07:39:51,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:39:51,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:39:51,348 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) [2022-04-05 07:39:51,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-05 07:39:52,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-05 07:39:52,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:39:52,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-05 07:39:52,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:39:53,875 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:39:53,879 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:39:53,888 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:39:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 113 proven. 117 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2022-04-05 07:39:55,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:39:55,651 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:51:25,108 WARN L232 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 07:51:46,662 WARN L232 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 18 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-05 07:51:58,693 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~b~0_BEFORE_CALL_203 Int) (v_main_~k~0_BEFORE_CALL_152 Int)) (or (= (mod (* (- 1) (* (- 1) v_main_~k~0_BEFORE_CALL_152 v_main_~b~0_BEFORE_CALL_203)) v_main_~b~0_BEFORE_CALL_203) 0) (<= v_main_~b~0_BEFORE_CALL_203 0))))) is different from true [2022-04-05 07:52:08,718 WARN L855 $PredicateComparison]: unable to prove that (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~b~0_BEFORE_CALL_203 Int) (v_main_~k~0_BEFORE_CALL_152 Int)) (or (= (mod (* (- 1) (* (- 1) v_main_~k~0_BEFORE_CALL_152 v_main_~b~0_BEFORE_CALL_203)) v_main_~b~0_BEFORE_CALL_203) 0) (<= v_main_~b~0_BEFORE_CALL_203 0))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-04-05 07:52:18,744 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~b~0_BEFORE_CALL_203 Int) (v_main_~k~0_BEFORE_CALL_152 Int)) (or (= (mod (* (- 1) (* (- 1) v_main_~k~0_BEFORE_CALL_152 v_main_~b~0_BEFORE_CALL_203)) v_main_~b~0_BEFORE_CALL_203) 0) (<= v_main_~b~0_BEFORE_CALL_203 0)))) is different from true [2022-04-05 07:52:19,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:52:19,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590768689] [2022-04-05 07:52:19,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:52:19,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269031635] [2022-04-05 07:52:19,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269031635] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 07:52:19,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:52:19,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-04-05 07:52:19,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799863770] [2022-04-05 07:52:19,037 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 07:52:19,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-05 07:52:19,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:52:19,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-05 07:52:19,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=754, Unknown=19, NotChecked=174, Total=1056 [2022-04-05 07:52:19,038 INFO L87 Difference]: Start difference. First operand 309 states and 426 transitions. Second operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 19 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2022-04-05 07:52:29,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:52:29,857 INFO L93 Difference]: Finished difference Result 348 states and 483 transitions. [2022-04-05 07:52:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-05 07:52:29,858 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 19 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) Word has length 160 [2022-04-05 07:52:29,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:52:29,859 INFO L225 Difference]: With dead ends: 348 [2022-04-05 07:52:29,859 INFO L226 Difference]: Without dead ends: 341 [2022-04-05 07:52:29,860 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 72.4s TimeCoverageRelationStatistics Valid=164, Invalid=1233, Unknown=21, NotChecked=222, Total=1640 [2022-04-05 07:52:29,860 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 49 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-04-05 07:52:29,860 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 365 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1305 Invalid, 0 Unknown, 108 Unchecked, 4.3s Time] [2022-04-05 07:52:29,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-04-05 07:52:29,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 294. [2022-04-05 07:52:29,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 155 states have (on average 1.135483870967742) internal successors, (176), 157 states have internal predecessors, (176), 113 states have call successors, (113), 26 states have call predecessors, (113), 25 states have return successors, (111), 110 states have call predecessors, (111), 111 states have call successors, (111) [2022-04-05 07:52:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 400 transitions. [2022-04-05 07:52:29,960 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 400 transitions. Word has length 160 [2022-04-05 07:52:29,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:52:29,961 INFO L478 AbstractCegarLoop]: Abstraction has 294 states and 400 transitions. [2022-04-05 07:52:29,961 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 19 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2022-04-05 07:52:29,961 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 400 transitions. [2022-04-05 07:52:29,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-05 07:52:29,962 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:52:29,962 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:52:29,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-05 07:52:30,167 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 [2022-04-05 07:52:30,167 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:52:30,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:52:30,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1942325010, now seen corresponding path program 2 times [2022-04-05 07:52:30,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:52:30,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723239376] [2022-04-05 07:52:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:52:30,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:52:30,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:52:30,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721125468] [2022-04-05 07:52:30,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 07:52:30,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:52:30,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:52:30,177 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) [2022-04-05 07:52:30,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-05 07:52:30,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 07:52:30,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:52:30,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 121 conjunts are in the unsatisfiable core [2022-04-05 07:52:30,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:52:32,015 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:52:32,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 273 proven. 224 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2022-04-05 07:52:32,292 INFO L328 TraceCheckSpWp]: Computing backward predicates...