/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/hard-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 10:33:37,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 10:33:37,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 10:33:37,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 10:33:37,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 10:33:37,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 10:33:37,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 10:33:37,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 10:33:37,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 10:33:37,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 10:33:37,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 10:33:37,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 10:33:37,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 10:33:37,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 10:33:37,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 10:33:37,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 10:33:37,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 10:33:37,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 10:33:37,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 10:33:37,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 10:33:37,494 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 10:33:37,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 10:33:37,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 10:33:37,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 10:33:37,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 10:33:37,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 10:33:37,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 10:33:37,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 10:33:37,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 10:33:37,509 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 10:33:37,530 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 10:33:37,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 10:33:37,531 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 10:33:37,531 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 10:33:37,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 10:33:37,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 10:33:37,534 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 10:33:37,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 10:33:37,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 10:33:37,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 10:33:37,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 10:33:37,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 10:33:37,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 10:33:37,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 10:33:37,535 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 10:33:37,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 10:33:37,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 10:33:37,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 10:33:37,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 10:33:37,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:33:37,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 10:33:37,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 10:33:37,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 10:33:37,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 10:33:37,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 10:33:37,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 10:33:37,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 10:33:37,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 10:33:37,537 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 10:33:37,538 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 10:33:37,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 10:33:37,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 10:33:37,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 10:33:37,732 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 10:33:37,733 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 10:33:37,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound10.c [2022-03-20 10:33:37,784 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/428ef6203/083ab1986b4f47579deafe97db2b2f20/FLAGb7c2903c4 [2022-03-20 10:33:38,107 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 10:33:38,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound10.c [2022-03-20 10:33:38,113 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/428ef6203/083ab1986b4f47579deafe97db2b2f20/FLAGb7c2903c4 [2022-03-20 10:33:38,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/428ef6203/083ab1986b4f47579deafe97db2b2f20 [2022-03-20 10:33:38,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 10:33:38,125 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 10:33:38,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 10:33:38,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 10:33:38,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 10:33:38,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:33:38" (1/1) ... [2022-03-20 10:33:38,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe723fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:38, skipping insertion in model container [2022-03-20 10:33:38,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:33:38" (1/1) ... [2022-03-20 10:33:38,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 10:33:38,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 10:33:38,260 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/hard-ll_unwindbound10.c[538,551] [2022-03-20 10:33:38,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:33:38,281 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 10:33:38,291 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/hard-ll_unwindbound10.c[538,551] [2022-03-20 10:33:38,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:33:38,306 INFO L208 MainTranslator]: Completed translation [2022-03-20 10:33:38,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:38 WrapperNode [2022-03-20 10:33:38,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 10:33:38,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 10:33:38,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 10:33:38,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 10:33:38,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:38" (1/1) ... [2022-03-20 10:33:38,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:38" (1/1) ... [2022-03-20 10:33:38,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:38" (1/1) ... [2022-03-20 10:33:38,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:38" (1/1) ... [2022-03-20 10:33:38,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:38" (1/1) ... [2022-03-20 10:33:38,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:38" (1/1) ... [2022-03-20 10:33:38,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:38" (1/1) ... [2022-03-20 10:33:38,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 10:33:38,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 10:33:38,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 10:33:38,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 10:33:38,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:38" (1/1) ... [2022-03-20 10:33:38,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:33:38,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:38,351 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 10:33:38,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 10:33:38,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 10:33:38,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 10:33:38,381 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 10:33:38,381 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 10:33:38,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 10:33:38,381 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 10:33:38,381 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 10:33:38,381 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 10:33:38,381 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 10:33:38,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 10:33:38,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 10:33:38,382 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 10:33:38,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 10:33:38,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 10:33:38,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 10:33:38,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 10:33:38,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 10:33:38,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 10:33:38,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 10:33:38,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 10:33:38,427 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 10:33:38,429 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 10:33:38,556 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 10:33:38,561 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 10:33:38,561 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 10:33:38,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:33:38 BoogieIcfgContainer [2022-03-20 10:33:38,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 10:33:38,563 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 10:33:38,563 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 10:33:38,564 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 10:33:38,566 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:33:38" (1/1) ... [2022-03-20 10:33:38,567 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 10:33:38,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:33:38 BasicIcfg [2022-03-20 10:33:38,585 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 10:33:38,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 10:33:38,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 10:33:38,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 10:33:38,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 10:33:38" (1/4) ... [2022-03-20 10:33:38,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ce5006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:33:38, skipping insertion in model container [2022-03-20 10:33:38,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:38" (2/4) ... [2022-03-20 10:33:38,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ce5006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:33:38, skipping insertion in model container [2022-03-20 10:33:38,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:33:38" (3/4) ... [2022-03-20 10:33:38,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ce5006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:33:38, skipping insertion in model container [2022-03-20 10:33:38,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:33:38" (4/4) ... [2022-03-20 10:33:38,590 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound10.cqvasr [2022-03-20 10:33:38,606 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 10:33:38,606 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 10:33:38,635 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 10:33:38,640 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 10:33:38,640 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 10:33:38,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 10:33:38,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 10:33:38,654 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:38,654 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:38,654 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:38,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:38,658 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-03-20 10:33:38,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:38,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057369944] [2022-03-20 10:33:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:38,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:38,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:33:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:38,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:33:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 10:33:38,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:38,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057369944] [2022-03-20 10:33:38,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057369944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:38,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:38,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 10:33:38,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831790829] [2022-03-20 10:33:38,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:38,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 10:33:38,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:38,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 10:33:38,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 10:33:38,884 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 10:33:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:38,976 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-03-20 10:33:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 10:33:38,978 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-20 10:33:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:38,984 INFO L225 Difference]: With dead ends: 66 [2022-03-20 10:33:38,984 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 10:33:38,987 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 10:33:38,990 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:38,991 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:33:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 10:33:39,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-20 10:33:39,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 10:33:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-20 10:33:39,027 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-03-20 10:33:39,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:39,028 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-20 10:33:39,028 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 10:33:39,028 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-20 10:33:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 10:33:39,029 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:39,030 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:39,030 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 10:33:39,030 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:39,031 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-03-20 10:33:39,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:39,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141240353] [2022-03-20 10:33:39,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:39,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:39,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:33:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:39,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:33:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 10:33:39,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:39,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141240353] [2022-03-20 10:33:39,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141240353] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:39,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:39,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 10:33:39,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192216807] [2022-03-20 10:33:39,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:39,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:33:39,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:39,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:33:39,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:33:39,162 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 10:33:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:39,311 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-03-20 10:33:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 10:33:39,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-20 10:33:39,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:39,313 INFO L225 Difference]: With dead ends: 47 [2022-03-20 10:33:39,314 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 10:33:39,319 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:33:39,320 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:39,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:33:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 10:33:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-03-20 10:33:39,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 10:33:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-20 10:33:39,341 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-03-20 10:33:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:39,341 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-20 10:33:39,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 10:33:39,341 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-20 10:33:39,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 10:33:39,342 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:39,342 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:39,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 10:33:39,343 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:39,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-03-20 10:33:39,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:39,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177923137] [2022-03-20 10:33:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:39,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:39,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:39,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309658047] [2022-03-20 10:33:39,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:39,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:39,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:39,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:39,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 10:33:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:39,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 10:33:39,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 10:33:39,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:33:39,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:39,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177923137] [2022-03-20 10:33:39,501 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:39,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309658047] [2022-03-20 10:33:39,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309658047] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:39,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:39,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 10:33:39,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301926695] [2022-03-20 10:33:39,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:39,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 10:33:39,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:39,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 10:33:39,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 10:33:39,506 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 10:33:39,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:39,520 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-03-20 10:33:39,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 10:33:39,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 10:33:39,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:39,521 INFO L225 Difference]: With dead ends: 52 [2022-03-20 10:33:39,521 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 10:33:39,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 10:33:39,528 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:39,529 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:33:39,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 10:33:39,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-20 10:33:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 10:33:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-03-20 10:33:39,538 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-03-20 10:33:39,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:39,538 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-03-20 10:33:39,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 10:33:39,538 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-03-20 10:33:39,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 10:33:39,539 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:39,539 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:39,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:39,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:39,745 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:39,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-03-20 10:33:39,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:39,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516414724] [2022-03-20 10:33:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:39,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:39,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:33:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:39,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:33:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:39,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-20 10:33:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 10:33:39,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:39,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516414724] [2022-03-20 10:33:39,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516414724] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:39,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:39,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 10:33:39,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823595158] [2022-03-20 10:33:39,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:39,822 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:33:39,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:39,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:33:39,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:33:39,823 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:33:39,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:39,941 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-20 10:33:39,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 10:33:39,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 10:33:39,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:39,942 INFO L225 Difference]: With dead ends: 52 [2022-03-20 10:33:39,942 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 10:33:39,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:33:39,943 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:39,943 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:33:39,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 10:33:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-03-20 10:33:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 10:33:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-20 10:33:39,956 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-03-20 10:33:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:39,956 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-20 10:33:39,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:33:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-20 10:33:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 10:33:39,958 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:39,958 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:39,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 10:33:39,959 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-03-20 10:33:39,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:39,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794873287] [2022-03-20 10:33:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:39,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:39,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:39,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057894073] [2022-03-20 10:33:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:39,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:39,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:39,969 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:39,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 10:33:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:40,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:33:40,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:33:40,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:33:40,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:40,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794873287] [2022-03-20 10:33:40,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:40,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057894073] [2022-03-20 10:33:40,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057894073] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:40,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:40,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:33:40,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095054845] [2022-03-20 10:33:40,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:40,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:33:40,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:40,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:33:40,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:33:40,135 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 10:33:40,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:40,180 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2022-03-20 10:33:40,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:33:40,180 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 10:33:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:40,182 INFO L225 Difference]: With dead ends: 71 [2022-03-20 10:33:40,182 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 10:33:40,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:33:40,184 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:40,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 154 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:33:40,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 10:33:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-20 10:33:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 10:33:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-03-20 10:33:40,200 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2022-03-20 10:33:40,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:40,200 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-03-20 10:33:40,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 10:33:40,200 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-03-20 10:33:40,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 10:33:40,201 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:40,201 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:40,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:40,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:40,416 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:40,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:40,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-03-20 10:33:40,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:40,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940233124] [2022-03-20 10:33:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:40,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:40,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:40,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010494251] [2022-03-20 10:33:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:40,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:40,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:40,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:40,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 10:33:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:40,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:33:40,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:33:40,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:33:40,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:40,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940233124] [2022-03-20 10:33:40,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:40,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010494251] [2022-03-20 10:33:40,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010494251] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:40,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:40,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:33:40,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148509706] [2022-03-20 10:33:40,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:40,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:33:40,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:40,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:33:40,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:33:40,526 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 10:33:40,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:40,551 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2022-03-20 10:33:40,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:33:40,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-03-20 10:33:40,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:40,552 INFO L225 Difference]: With dead ends: 76 [2022-03-20 10:33:40,552 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 10:33:40,552 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:33:40,553 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:40,553 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 136 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:33:40,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 10:33:40,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-20 10:33:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 10:33:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2022-03-20 10:33:40,567 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2022-03-20 10:33:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:40,568 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2022-03-20 10:33:40,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 10:33:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2022-03-20 10:33:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 10:33:40,569 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:40,569 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:40,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:40,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:40,774 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-03-20 10:33:40,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:40,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2483403] [2022-03-20 10:33:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:40,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:40,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:40,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201951350] [2022-03-20 10:33:40,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:40,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:40,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:40,783 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:40,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 10:33:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:40,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 10:33:40,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:33:40,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:33:40,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:40,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2483403] [2022-03-20 10:33:40,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:40,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201951350] [2022-03-20 10:33:40,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201951350] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:40,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:40,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 10:33:40,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301427513] [2022-03-20 10:33:40,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:40,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:33:40,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:40,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:33:40,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:33:40,957 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:33:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:41,007 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-03-20 10:33:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 10:33:41,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-20 10:33:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:41,008 INFO L225 Difference]: With dead ends: 74 [2022-03-20 10:33:41,008 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 10:33:41,009 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 10:33:41,009 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:41,009 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 184 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:33:41,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 10:33:41,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-20 10:33:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 10:33:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-03-20 10:33:41,014 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2022-03-20 10:33:41,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:41,014 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-03-20 10:33:41,014 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:33:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-03-20 10:33:41,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 10:33:41,015 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:41,015 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-03-20 10:33:41,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:41,233 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:41,234 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:41,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:41,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-03-20 10:33:41,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:41,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672934806] [2022-03-20 10:33:41,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:41,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:41,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:41,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163827831] [2022-03-20 10:33:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:41,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:41,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:41,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:41,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 10:33:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:41,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:33:41,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:33:41,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:33:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:33:41,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:41,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672934806] [2022-03-20 10:33:41,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:41,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163827831] [2022-03-20 10:33:41,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163827831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:33:41,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:33:41,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 10:33:41,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593088626] [2022-03-20 10:33:41,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:33:41,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 10:33:41,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:41,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 10:33:41,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 10:33:41,437 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 10:33:41,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:41,521 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2022-03-20 10:33:41,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 10:33:41,521 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-03-20 10:33:41,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:41,522 INFO L225 Difference]: With dead ends: 123 [2022-03-20 10:33:41,522 INFO L226 Difference]: Without dead ends: 109 [2022-03-20 10:33:41,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:33:41,523 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 54 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:41,523 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 217 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:33:41,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-20 10:33:41,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2022-03-20 10:33:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 67 states have internal predecessors, (77), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 10:33:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-03-20 10:33:41,530 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 38 [2022-03-20 10:33:41,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:41,530 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-03-20 10:33:41,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 10:33:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-03-20 10:33:41,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 10:33:41,531 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:41,531 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:41,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:41,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:41,747 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:41,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:41,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-03-20 10:33:41,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:41,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722306160] [2022-03-20 10:33:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:41,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:41,754 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:41,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786175670] [2022-03-20 10:33:41,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:41,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:41,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:41,755 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:41,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 10:33:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:41,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 10:33:41,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 10:33:41,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:33:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 10:33:42,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:42,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722306160] [2022-03-20 10:33:42,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:42,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786175670] [2022-03-20 10:33:42,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786175670] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 10:33:42,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:33:42,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 10:33:42,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78058393] [2022-03-20 10:33:42,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:42,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:33:42,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:42,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:33:42,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:33:42,048 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:33:42,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:42,084 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2022-03-20 10:33:42,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:33:42,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-03-20 10:33:42,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:42,086 INFO L225 Difference]: With dead ends: 120 [2022-03-20 10:33:42,099 INFO L226 Difference]: Without dead ends: 118 [2022-03-20 10:33:42,100 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:33:42,100 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:42,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 136 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:33:42,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-20 10:33:42,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-03-20 10:33:42,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 76 states have internal predecessors, (85), 25 states have call successors, (25), 17 states have call predecessors, (25), 16 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 10:33:42,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2022-03-20 10:33:42,113 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 46 [2022-03-20 10:33:42,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:42,114 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2022-03-20 10:33:42,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:33:42,114 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2022-03-20 10:33:42,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 10:33:42,118 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:42,118 INFO L499 BasicCegarLoop]: trace histogram [7, 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] [2022-03-20 10:33:42,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:42,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:42,331 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:42,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:42,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2022-03-20 10:33:42,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:42,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826092314] [2022-03-20 10:33:42,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:42,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:42,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:42,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209255851] [2022-03-20 10:33:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:42,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:42,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:42,340 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:42,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 10:33:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:42,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 10:33:42,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 10:33:42,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:33:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 10:33:42,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:42,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826092314] [2022-03-20 10:33:42,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:42,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209255851] [2022-03-20 10:33:42,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209255851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:33:42,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:33:42,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 10:33:42,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049748529] [2022-03-20 10:33:42,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:33:42,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 10:33:42,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:42,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 10:33:42,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:33:42,557 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 10:33:42,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:42,697 INFO L93 Difference]: Finished difference Result 207 states and 246 transitions. [2022-03-20 10:33:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 10:33:42,698 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 54 [2022-03-20 10:33:42,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:42,702 INFO L225 Difference]: With dead ends: 207 [2022-03-20 10:33:42,702 INFO L226 Difference]: Without dead ends: 193 [2022-03-20 10:33:42,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-03-20 10:33:42,703 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 106 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:42,703 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 224 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:33:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-20 10:33:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2022-03-20 10:33:42,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 125 states have internal predecessors, (139), 43 states have call successors, (43), 25 states have call predecessors, (43), 24 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 10:33:42,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2022-03-20 10:33:42,720 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 54 [2022-03-20 10:33:42,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:42,720 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2022-03-20 10:33:42,720 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 10:33:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2022-03-20 10:33:42,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 10:33:42,722 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:42,722 INFO L499 BasicCegarLoop]: trace histogram [7, 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] [2022-03-20 10:33:42,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:42,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:42,935 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:42,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2022-03-20 10:33:42,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:42,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950234945] [2022-03-20 10:33:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:42,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:42,942 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:42,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146435445] [2022-03-20 10:33:42,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:42,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:42,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:42,946 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:42,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 10:33:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:42,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 10:33:42,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 10:33:43,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:33:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 10:33:43,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:43,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950234945] [2022-03-20 10:33:43,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:43,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146435445] [2022-03-20 10:33:43,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146435445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:33:43,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:33:43,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 10:33:43,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50978836] [2022-03-20 10:33:43,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:33:43,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 10:33:43,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:43,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 10:33:43,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:33:43,462 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 10:33:43,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:43,650 INFO L93 Difference]: Finished difference Result 268 states and 340 transitions. [2022-03-20 10:33:43,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 10:33:43,652 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 54 [2022-03-20 10:33:43,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:43,653 INFO L225 Difference]: With dead ends: 268 [2022-03-20 10:33:43,653 INFO L226 Difference]: Without dead ends: 264 [2022-03-20 10:33:43,653 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-20 10:33:43,672 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 58 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:43,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 294 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:33:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-20 10:33:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 239. [2022-03-20 10:33:43,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 155 states have (on average 1.2193548387096773) internal successors, (189), 163 states have internal predecessors, (189), 56 states have call successors, (56), 29 states have call predecessors, (56), 27 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 10:33:43,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 296 transitions. [2022-03-20 10:33:43,687 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 296 transitions. Word has length 54 [2022-03-20 10:33:43,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:43,687 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 296 transitions. [2022-03-20 10:33:43,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 10:33:43,687 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 296 transitions. [2022-03-20 10:33:43,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 10:33:43,688 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:43,688 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:43,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:43,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 10:33:43,903 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:43,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2022-03-20 10:33:43,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:43,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331024426] [2022-03-20 10:33:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:43,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:43,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734222096] [2022-03-20 10:33:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:43,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:43,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:43,914 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:43,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 10:33:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:43,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 10:33:43,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-20 10:33:44,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:34:14,636 WARN L232 SmtUtils]: Spent 18.96s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:35:32,189 WARN L232 SmtUtils]: Spent 26.35s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:36:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-20 10:36:45,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:36:45,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331024426] [2022-03-20 10:36:45,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:36:45,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734222096] [2022-03-20 10:36:45,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734222096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:36:45,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:36:45,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-20 10:36:45,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132014372] [2022-03-20 10:36:45,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:36:45,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 10:36:45,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:36:45,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 10:36:45,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=271, Unknown=1, NotChecked=0, Total=342 [2022-03-20 10:36:45,105 INFO L87 Difference]: Start difference. First operand 239 states and 296 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 10:36:47,157 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:36:58,577 WARN L232 SmtUtils]: Spent 10.32s on a formula simplification. DAG size of input: 57 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:37:02,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:37:24,139 WARN L232 SmtUtils]: Spent 20.92s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:37:30,625 WARN L232 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 58 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:37:36,548 WARN L232 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 63 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:37:40,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:37:40,193 INFO L93 Difference]: Finished difference Result 369 states and 471 transitions. [2022-03-20 10:37:40,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 10:37:40,193 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 68 [2022-03-20 10:37:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:37:40,196 INFO L225 Difference]: With dead ends: 369 [2022-03-20 10:37:40,196 INFO L226 Difference]: Without dead ends: 293 [2022-03-20 10:37:40,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 92.2s TimeCoverageRelationStatistics Valid=162, Invalid=649, Unknown=1, NotChecked=0, Total=812 [2022-03-20 10:37:40,197 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 122 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:37:40,198 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 350 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 413 Invalid, 2 Unknown, 0 Unchecked, 11.1s Time] [2022-03-20 10:37:40,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-20 10:37:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 252. [2022-03-20 10:37:40,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 168 states have (on average 1.1904761904761905) internal successors, (200), 176 states have internal predecessors, (200), 53 states have call successors, (53), 31 states have call predecessors, (53), 30 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-20 10:37:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 302 transitions. [2022-03-20 10:37:40,214 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 302 transitions. Word has length 68 [2022-03-20 10:37:40,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:37:40,214 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 302 transitions. [2022-03-20 10:37:40,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 10:37:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 302 transitions. [2022-03-20 10:37:40,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 10:37:40,215 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:37:40,215 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:37:40,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 10:37:40,429 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:37:40,429 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:37:40,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:37:40,430 INFO L85 PathProgramCache]: Analyzing trace with hash -742748636, now seen corresponding path program 1 times [2022-03-20 10:37:40,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:37:40,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464981028] [2022-03-20 10:37:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:40,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:37:40,436 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:37:40,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253441293] [2022-03-20 10:37:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:40,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:37:40,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:37:40,437 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:37:40,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 10:37:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:37:40,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 10:37:40,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:37:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-20 10:37:40,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:37:43,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:37:43,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464981028] [2022-03-20 10:37:43,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:37:43,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253441293] [2022-03-20 10:37:43,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253441293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 10:37:43,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:37:43,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 10:37:43,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817521200] [2022-03-20 10:37:43,231 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 10:37:43,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 10:37:43,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:37:43,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 10:37:43,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-20 10:37:43,232 INFO L87 Difference]: Start difference. First operand 252 states and 302 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 10:37:44,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:37:44,074 INFO L93 Difference]: Finished difference Result 350 states and 433 transitions. [2022-03-20 10:37:44,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 10:37:44,075 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2022-03-20 10:37:44,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:37:44,076 INFO L225 Difference]: With dead ends: 350 [2022-03-20 10:37:44,076 INFO L226 Difference]: Without dead ends: 287 [2022-03-20 10:37:44,077 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-03-20 10:37:44,077 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 10:37:44,077 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 528 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 10:37:44,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-20 10:37:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 268. [2022-03-20 10:37:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 178 states have (on average 1.1797752808988764) internal successors, (210), 186 states have internal predecessors, (210), 57 states have call successors, (57), 34 states have call predecessors, (57), 32 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-20 10:37:44,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 320 transitions. [2022-03-20 10:37:44,108 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 320 transitions. Word has length 79 [2022-03-20 10:37:44,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:37:44,108 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 320 transitions. [2022-03-20 10:37:44,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 10:37:44,109 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 320 transitions. [2022-03-20 10:37:44,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 10:37:44,109 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:37:44,109 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:37:44,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 10:37:44,324 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 10:37:44,324 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:37:44,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:37:44,325 INFO L85 PathProgramCache]: Analyzing trace with hash -911798983, now seen corresponding path program 2 times [2022-03-20 10:37:44,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:37:44,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854790589] [2022-03-20 10:37:44,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:44,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:37:44,330 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:37:44,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076497208] [2022-03-20 10:37:44,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:37:44,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:37:44,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:37:44,348 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:37:44,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 10:37:44,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:37:44,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:37:44,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:37:44,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:37:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 10:37:44,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:37:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 10:37:44,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:37:44,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854790589] [2022-03-20 10:37:44,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:37:44,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076497208] [2022-03-20 10:37:44,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076497208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:37:44,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:37:44,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-03-20 10:37:44,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824893036] [2022-03-20 10:37:44,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:37:44,626 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:37:44,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:37:44,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:37:44,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:37:44,627 INFO L87 Difference]: Start difference. First operand 268 states and 320 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-20 10:37:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:37:44,697 INFO L93 Difference]: Finished difference Result 306 states and 366 transitions. [2022-03-20 10:37:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 10:37:44,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 82 [2022-03-20 10:37:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:37:44,698 INFO L225 Difference]: With dead ends: 306 [2022-03-20 10:37:44,698 INFO L226 Difference]: Without dead ends: 259 [2022-03-20 10:37:44,699 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:37:44,699 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:37:44,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 141 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:37:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-20 10:37:44,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 248. [2022-03-20 10:37:44,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 166 states have (on average 1.1686746987951808) internal successors, (194), 171 states have internal predecessors, (194), 51 states have call successors, (51), 32 states have call predecessors, (51), 30 states have return successors, (48), 44 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-20 10:37:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 293 transitions. [2022-03-20 10:37:44,713 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 293 transitions. Word has length 82 [2022-03-20 10:37:44,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:37:44,713 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 293 transitions. [2022-03-20 10:37:44,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-20 10:37:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 293 transitions. [2022-03-20 10:37:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 10:37:44,714 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:37:44,714 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:37:44,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 10:37:44,931 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,SelfDestructingSolverStorable13 [2022-03-20 10:37:44,931 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:37:44,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:37:44,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1053492757, now seen corresponding path program 1 times [2022-03-20 10:37:44,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:37:44,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158266607] [2022-03-20 10:37:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:44,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:37:44,937 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:37:44,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611972600] [2022-03-20 10:37:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:44,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:37:44,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:37:44,940 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:37:44,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 10:37:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:37:44,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 10:37:44,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:37:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 10:37:45,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:37:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 10:37:45,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:37:45,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158266607] [2022-03-20 10:37:45,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:37:45,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611972600] [2022-03-20 10:37:45,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611972600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:37:45,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:37:45,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-20 10:37:45,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393605151] [2022-03-20 10:37:45,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:37:45,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 10:37:45,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:37:45,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 10:37:45,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:37:45,492 INFO L87 Difference]: Start difference. First operand 248 states and 293 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-20 10:37:45,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:37:45,693 INFO L93 Difference]: Finished difference Result 254 states and 299 transitions. [2022-03-20 10:37:45,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 10:37:45,693 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 84 [2022-03-20 10:37:45,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:37:45,694 INFO L225 Difference]: With dead ends: 254 [2022-03-20 10:37:45,694 INFO L226 Difference]: Without dead ends: 229 [2022-03-20 10:37:45,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:37:45,694 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 12 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 10:37:45,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 296 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 10:37:45,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-20 10:37:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-03-20 10:37:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 153 states have (on average 1.1764705882352942) internal successors, (180), 158 states have internal predecessors, (180), 47 states have call successors, (47), 30 states have call predecessors, (47), 28 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 10:37:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 271 transitions. [2022-03-20 10:37:45,707 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 271 transitions. Word has length 84 [2022-03-20 10:37:45,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:37:45,707 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 271 transitions. [2022-03-20 10:37:45,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-20 10:37:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 271 transitions. [2022-03-20 10:37:45,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 10:37:45,708 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:37:45,708 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-03-20 10:37:45,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 10:37:45,924 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,SelfDestructingSolverStorable14 [2022-03-20 10:37:45,924 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:37:45,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:37:45,924 INFO L85 PathProgramCache]: Analyzing trace with hash -883405496, now seen corresponding path program 1 times [2022-03-20 10:37:45,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:37:45,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562379992] [2022-03-20 10:37:45,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:45,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:37:45,930 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:37:45,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674602574] [2022-03-20 10:37:45,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:45,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:37:45,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:37:45,931 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:37:45,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 10:37:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:37:45,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 10:37:45,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:37:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-20 10:37:46,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:37:46,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:37:46,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562379992] [2022-03-20 10:37:46,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:37:46,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674602574] [2022-03-20 10:37:46,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674602574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:37:46,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:37:46,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:37:46,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991638281] [2022-03-20 10:37:46,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:37:46,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:37:46,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:37:46,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:37:46,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:37:46,114 INFO L87 Difference]: Start difference. First operand 229 states and 271 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 10:37:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:37:46,163 INFO L93 Difference]: Finished difference Result 249 states and 296 transitions. [2022-03-20 10:37:46,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:37:46,164 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), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 88 [2022-03-20 10:37:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:37:46,164 INFO L225 Difference]: With dead ends: 249 [2022-03-20 10:37:46,165 INFO L226 Difference]: Without dead ends: 228 [2022-03-20 10:37:46,165 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:37:46,165 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 26 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:37:46,165 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 105 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:37:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-03-20 10:37:46,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 218. [2022-03-20 10:37:46,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 147 states have (on average 1.1360544217687074) internal successors, (167), 150 states have internal predecessors, (167), 43 states have call successors, (43), 28 states have call predecessors, (43), 27 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 10:37:46,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 251 transitions. [2022-03-20 10:37:46,177 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 251 transitions. Word has length 88 [2022-03-20 10:37:46,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:37:46,177 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 251 transitions. [2022-03-20 10:37:46,177 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), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 10:37:46,177 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 251 transitions. [2022-03-20 10:37:46,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 10:37:46,178 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:37:46,178 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:37:46,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 10:37:46,394 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,SelfDestructingSolverStorable15 [2022-03-20 10:37:46,394 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:37:46,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:37:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash -873799525, now seen corresponding path program 3 times [2022-03-20 10:37:46,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:37:46,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400068850] [2022-03-20 10:37:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:46,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:37:46,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:37:46,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295140586] [2022-03-20 10:37:46,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 10:37:46,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:37:46,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:37:46,401 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:37:46,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 10:37:46,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 10:37:46,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:37:46,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 10:37:46,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:37:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 61 proven. 31 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-20 10:37:47,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:38:01,960 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~B~0 4294967296))) (or (not (= c_main_~d~0 (* c_main_~p~0 .cse0))) (let ((.cse4 (= (mod c_main_~p~0 2) 0)) (.cse10 (div c_main_~p~0 2))) (let ((.cse6 (* (+ c_main_~q~0 .cse10) .cse0)) (.cse7 (not .cse4)) (.cse1 (mod c_main_~A~0 4294967296)) (.cse2 (* (- 1) (div c_main_~d~0 2))) (.cse3 (* (+ c_main_~q~0 .cse10 1) .cse0)) (.cse9 (= (mod c_main_~d~0 2) 0)) (.cse8 (< c_main_~d~0 0))) (and (or (let ((.cse5 (< c_main_~p~0 0))) (and (or (= .cse1 (+ c_main_~r~0 .cse2 .cse3)) .cse4 (not .cse5)) (or (= .cse1 (+ .cse6 c_main_~r~0 .cse2)) (and .cse7 .cse5)))) (and .cse8 (not .cse9))) (or (and (or (= .cse1 (+ (- 1) .cse6 c_main_~r~0 .cse2)) .cse7) (or .cse4 (= .cse1 (+ (- 1) c_main_~r~0 .cse2 .cse3)))) .cse9 (not .cse8))))))) is different from true [2022-03-20 10:38:58,395 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~B~0 4294967296))) (or (not (= c_main_~d~0 (* c_main_~p~0 .cse0))) (let ((.cse5 (= (mod c_main_~p~0 2) 0)) (.cse11 (div c_main_~p~0 2))) (let ((.cse9 (< c_main_~d~0 0)) (.cse8 (= (mod c_main_~d~0 2) 0)) (.cse4 (* (+ c_main_~q~0 c_main_~p~0 .cse11 1) .cse0)) (.cse1 (mod c_main_~A~0 4294967296)) (.cse6 (* .cse0 (+ c_main_~q~0 c_main_~p~0 .cse11))) (.cse2 (* (- 1) c_main_~d~0)) (.cse3 (* (- 1) (div c_main_~d~0 2))) (.cse7 (not .cse5))) (and (or (and (or (= .cse1 (+ (- 1) .cse2 c_main_~r~0 .cse3 .cse4)) .cse5) (or (= .cse1 (+ (- 1) .cse6 .cse2 c_main_~r~0 .cse3)) .cse7)) .cse8 (not .cse9)) (or (and .cse9 (not .cse8)) (let ((.cse10 (< c_main_~p~0 0))) (and (or (= .cse1 (+ .cse2 c_main_~r~0 .cse3 .cse4)) .cse5 (not .cse10)) (or (= .cse1 (+ .cse6 .cse2 c_main_~r~0 .cse3)) (and .cse7 .cse10)))))))))) is different from true [2022-03-20 10:39:26,280 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse5 (div c_main_~d~0 2)) (.cse3 (< c_main_~d~0 0)) (.cse2 (= (mod c_main_~d~0 2) 0))) (let ((.cse4 (and .cse3 (not .cse2))) (.cse0 (+ .cse5 1)) (.cse7 (mod c_main_~A~0 4294967296)) (.cse19 (= (mod c_main_~p~0 2) 0)) (.cse20 (< c_main_~p~0 0)) (.cse17 (mod c_main_~B~0 4294967296)) (.cse16 (div c_main_~p~0 2))) (and (let ((.cse1 (* .cse17 .cse16))) (or (and (or (not (= .cse0 .cse1)) .cse2 (not .cse3)) (or .cse4 (not (= .cse5 .cse1)))) (let ((.cse18 (div .cse16 2)) (.cse6 (= (mod .cse16 2) 0))) (let ((.cse13 (= (mod .cse1 2) 0)) (.cse14 (< .cse1 0)) (.cse12 (not .cse6)) (.cse11 (* .cse17 (+ c_main_~q~0 .cse16 .cse18))) (.cse8 (* .cse17 (+ c_main_~q~0 .cse16 .cse18 1))) (.cse9 (* (- 1) (div .cse1 2))) (.cse10 (* (- 1) .cse1))) (and (or (and (or .cse6 (= .cse7 (+ (- 1) .cse8 .cse9 .cse10 c_main_~r~0))) (or (= (+ (- 1) .cse9 .cse10 .cse11 c_main_~r~0) .cse7) .cse12)) .cse13 (not .cse14)) (or (and (not .cse13) .cse14) (let ((.cse15 (< .cse16 0))) (and (or (and .cse12 .cse15) (= (+ .cse9 .cse10 .cse11 c_main_~r~0) .cse7)) (or (not .cse15) .cse6 (= .cse7 (+ .cse8 .cse9 .cse10 c_main_~r~0))))))))) (and (not .cse19) .cse20))) (let ((.cse30 (+ .cse16 1))) (let ((.cse21 (* .cse30 .cse17))) (or (and (or .cse4 (not (= .cse21 .cse5))) (or (not (= .cse0 .cse21)) .cse2)) (let ((.cse27 (= (mod .cse30 2) 0)) (.cse29 (div .cse30 2))) (let ((.cse26 (* .cse17 (+ c_main_~q~0 .cse29 2 .cse16))) (.cse22 (not .cse27)) (.cse23 (* (- 1) (div .cse21 2))) (.cse24 (* (+ c_main_~q~0 .cse29 .cse16 1) .cse17)) (.cse25 (* (- 1) .cse21)) (.cse28 (= (mod .cse21 2) 0))) (and (or (and (or .cse22 (= .cse7 (+ .cse23 c_main_~r~0 .cse24 .cse25))) (or (= .cse7 (+ .cse23 .cse26 c_main_~r~0 .cse25)) .cse27)) (not .cse28)) (or (and (or (= (+ (- 1) .cse23 .cse26 c_main_~r~0 .cse25) .cse7) .cse27) (or .cse22 (= (+ (- 1) .cse23 c_main_~r~0 .cse24 .cse25) .cse7))) .cse28)))) .cse19 (not .cse20))))))) is different from true [2022-03-20 10:45:53,424 WARN L232 SmtUtils]: Spent 16.65s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:46:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 276 trivial. 24 not checked. [2022-03-20 10:46:56,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:46:56,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400068850] [2022-03-20 10:46:56,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:46:56,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295140586] [2022-03-20 10:46:56,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295140586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:46:56,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:46:56,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2022-03-20 10:46:56,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907712238] [2022-03-20 10:46:56,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:46:56,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 10:46:56,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:46:56,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 10:46:56,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=347, Unknown=4, NotChecked=120, Total=552 [2022-03-20 10:46:56,917 INFO L87 Difference]: Start difference. First operand 218 states and 251 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 21 states have internal predecessors, (60), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 9 states have call successors, (29) [2022-03-20 10:46:59,017 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:47:01,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:47:03,236 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:47:05,259 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:47:16,187 WARN L232 SmtUtils]: Spent 10.41s on a formula simplification. DAG size of input: 146 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:47:28,299 WARN L232 SmtUtils]: Spent 10.82s on a formula simplification. DAG size of input: 58 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:47:32,530 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:47:35,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:47:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:47:38,067 INFO L93 Difference]: Finished difference Result 281 states and 347 transitions. [2022-03-20 10:47:38,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 10:47:38,067 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 21 states have internal predecessors, (60), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 9 states have call successors, (29) Word has length 100 [2022-03-20 10:47:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:47:38,068 INFO L225 Difference]: With dead ends: 281 [2022-03-20 10:47:38,068 INFO L226 Difference]: Without dead ends: 253 [2022-03-20 10:47:38,069 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 174 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 48.1s TimeCoverageRelationStatistics Valid=170, Invalid=708, Unknown=4, NotChecked=174, Total=1056 [2022-03-20 10:47:38,069 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 117 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 199 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2022-03-20 10:47:38,069 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 610 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 804 Invalid, 6 Unknown, 395 Unchecked, 18.7s Time] [2022-03-20 10:47:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-20 10:47:38,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 233. [2022-03-20 10:47:38,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 156 states have (on average 1.1474358974358974) internal successors, (179), 161 states have internal predecessors, (179), 48 states have call successors, (48), 29 states have call predecessors, (48), 28 states have return successors, (46), 42 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-20 10:47:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 273 transitions. [2022-03-20 10:47:38,084 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 273 transitions. Word has length 100 [2022-03-20 10:47:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:47:38,084 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 273 transitions. [2022-03-20 10:47:38,084 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 21 states have internal predecessors, (60), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 9 states have call successors, (29) [2022-03-20 10:47:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 273 transitions. [2022-03-20 10:47:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-20 10:47:38,085 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:47:38,085 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 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] [2022-03-20 10:47:38,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 10:47:38,292 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:47:38,292 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:47:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:47:38,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1055508743, now seen corresponding path program 1 times [2022-03-20 10:47:38,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:47:38,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302380412] [2022-03-20 10:47:38,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:47:38,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:47:38,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:47:38,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010673509] [2022-03-20 10:47:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:47:38,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:47:38,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:47:38,310 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:47:38,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 10:47:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:47:38,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 10:47:38,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:47:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-20 10:47:38,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:47:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-20 10:47:38,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:47:38,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302380412] [2022-03-20 10:47:38,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:47:38,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010673509] [2022-03-20 10:47:38,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010673509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:47:38,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:47:38,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 10:47:38,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333623407] [2022-03-20 10:47:38,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:47:38,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 10:47:38,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:47:38,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 10:47:38,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:47:38,746 INFO L87 Difference]: Start difference. First operand 233 states and 273 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 12 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2022-03-20 10:47:39,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:47:39,259 INFO L93 Difference]: Finished difference Result 560 states and 682 transitions. [2022-03-20 10:47:39,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 10:47:39,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 12 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) Word has length 106 [2022-03-20 10:47:39,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:47:39,261 INFO L225 Difference]: With dead ends: 560 [2022-03-20 10:47:39,261 INFO L226 Difference]: Without dead ends: 502 [2022-03-20 10:47:39,262 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-20 10:47:39,262 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 238 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 10:47:39,262 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 315 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 10:47:39,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-03-20 10:47:39,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 483. [2022-03-20 10:47:39,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 316 states have (on average 1.1835443037974684) internal successors, (374), 339 states have internal predecessors, (374), 107 states have call successors, (107), 60 states have call predecessors, (107), 59 states have return successors, (101), 83 states have call predecessors, (101), 101 states have call successors, (101) [2022-03-20 10:47:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 582 transitions. [2022-03-20 10:47:39,297 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 582 transitions. Word has length 106 [2022-03-20 10:47:39,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:47:39,297 INFO L478 AbstractCegarLoop]: Abstraction has 483 states and 582 transitions. [2022-03-20 10:47:39,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 12 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2022-03-20 10:47:39,298 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 582 transitions. [2022-03-20 10:47:39,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 10:47:39,298 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:47:39,299 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 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] [2022-03-20 10:47:39,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 10:47:39,511 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,SelfDestructingSolverStorable17 [2022-03-20 10:47:39,511 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:47:39,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:47:39,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1401143091, now seen corresponding path program 2 times [2022-03-20 10:47:39,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:47:39,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70915644] [2022-03-20 10:47:39,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:47:39,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:47:39,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:47:39,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859062959] [2022-03-20 10:47:39,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:47:39,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:47:39,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:47:39,522 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:47:39,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 10:47:39,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:47:39,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:47:39,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 10:47:39,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:47:40,479 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 10:47:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 71 proven. 35 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-03-20 10:47:41,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:47:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 71 proven. 35 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-03-20 10:47:48,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:47:48,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70915644] [2022-03-20 10:47:48,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:47:48,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859062959] [2022-03-20 10:47:48,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859062959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:47:48,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:47:48,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-03-20 10:47:48,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697101354] [2022-03-20 10:47:48,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:47:48,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 10:47:48,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:47:48,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 10:47:48,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2022-03-20 10:47:48,272 INFO L87 Difference]: Start difference. First operand 483 states and 582 transitions. Second operand has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 15 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (32), 15 states have call predecessors, (32), 13 states have call successors, (32) [2022-03-20 10:47:56,751 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:48:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:48:04,184 INFO L93 Difference]: Finished difference Result 612 states and 752 transitions. [2022-03-20 10:48:04,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 10:48:04,187 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 15 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (32), 15 states have call predecessors, (32), 13 states have call successors, (32) Word has length 111 [2022-03-20 10:48:04,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:48:04,191 INFO L225 Difference]: With dead ends: 612 [2022-03-20 10:48:04,191 INFO L226 Difference]: Without dead ends: 495 [2022-03-20 10:48:04,192 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=374, Invalid=1108, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 10:48:04,193 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 161 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-03-20 10:48:04,193 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 556 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-03-20 10:48:04,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-20 10:48:04,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 440. [2022-03-20 10:48:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 288 states have (on average 1.1805555555555556) internal successors, (340), 308 states have internal predecessors, (340), 96 states have call successors, (96), 56 states have call predecessors, (96), 55 states have return successors, (91), 75 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-20 10:48:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 527 transitions. [2022-03-20 10:48:04,243 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 527 transitions. Word has length 111 [2022-03-20 10:48:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:48:04,243 INFO L478 AbstractCegarLoop]: Abstraction has 440 states and 527 transitions. [2022-03-20 10:48:04,243 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 15 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (32), 15 states have call predecessors, (32), 13 states have call successors, (32) [2022-03-20 10:48:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 527 transitions. [2022-03-20 10:48:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 10:48:04,244 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:48:04,244 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:48:04,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 10:48:04,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:48:04,459 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:48:04,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:48:04,460 INFO L85 PathProgramCache]: Analyzing trace with hash 220761538, now seen corresponding path program 1 times [2022-03-20 10:48:04,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:48:04,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141025853] [2022-03-20 10:48:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:48:04,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:48:04,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:48:04,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432921849] [2022-03-20 10:48:04,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:48:04,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:48:04,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:48:04,468 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:48:04,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 10:48:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:48:04,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 10:48:04,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:48:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 470 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-20 10:48:04,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:48:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 10:48:04,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:48:04,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141025853] [2022-03-20 10:48:04,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:48:04,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432921849] [2022-03-20 10:48:04,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432921849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:48:04,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:48:04,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-03-20 10:48:04,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918520742] [2022-03-20 10:48:04,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:48:04,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 10:48:04,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:48:04,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 10:48:04,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:48:04,957 INFO L87 Difference]: Start difference. First operand 440 states and 527 transitions. Second operand has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 12 states have call successors, (38), 9 states have call predecessors, (38), 8 states have return successors, (36), 10 states have call predecessors, (36), 11 states have call successors, (36) [2022-03-20 10:48:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:48:05,278 INFO L93 Difference]: Finished difference Result 506 states and 598 transitions. [2022-03-20 10:48:05,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 10:48:05,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 12 states have call successors, (38), 9 states have call predecessors, (38), 8 states have return successors, (36), 10 states have call predecessors, (36), 11 states have call successors, (36) Word has length 118 [2022-03-20 10:48:05,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:48:05,280 INFO L225 Difference]: With dead ends: 506 [2022-03-20 10:48:05,280 INFO L226 Difference]: Without dead ends: 458 [2022-03-20 10:48:05,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2022-03-20 10:48:05,281 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 166 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 10:48:05,281 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 286 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 10:48:05,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-03-20 10:48:05,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 452. [2022-03-20 10:48:05,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 304 states have (on average 1.1217105263157894) internal successors, (341), 318 states have internal predecessors, (341), 93 states have call successors, (93), 56 states have call predecessors, (93), 54 states have return successors, (88), 77 states have call predecessors, (88), 88 states have call successors, (88) [2022-03-20 10:48:05,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 522 transitions. [2022-03-20 10:48:05,321 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 522 transitions. Word has length 118 [2022-03-20 10:48:05,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:48:05,321 INFO L478 AbstractCegarLoop]: Abstraction has 452 states and 522 transitions. [2022-03-20 10:48:05,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 12 states have call successors, (38), 9 states have call predecessors, (38), 8 states have return successors, (36), 10 states have call predecessors, (36), 11 states have call successors, (36) [2022-03-20 10:48:05,321 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 522 transitions. [2022-03-20 10:48:05,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 10:48:05,322 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:48:05,322 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:48:05,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 10:48:05,538 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:48:05,538 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:48:05,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:48:05,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1839670996, now seen corresponding path program 4 times [2022-03-20 10:48:05,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:48:05,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050467167] [2022-03-20 10:48:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:48:05,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:48:05,544 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:48:05,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562797783] [2022-03-20 10:48:05,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 10:48:05,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:48:05,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:48:05,546 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:48:05,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 10:48:05,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 10:48:05,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:48:05,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 10:48:05,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:48:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 63 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-20 10:48:06,767 INFO L328 TraceCheckSpWp]: Computing backward predicates...