/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:20:24,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:20:24,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:20:24,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:20:24,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:20:24,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:20:24,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:20:24,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:20:24,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:20:24,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:20:24,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:20:24,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:20:24,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:20:24,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:20:24,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:20:24,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:20:24,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:20:24,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:20:24,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:20:24,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:20:24,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:20:24,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:20:24,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:20:24,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:20:24,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:20:24,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:20:24,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:20:24,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:20:24,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:20:24,379 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:20:24,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:20:24,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:20:24,382 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:20:24,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:20:24,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:20:24,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:20:24,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:20:24,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:20:24,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:20:24,383 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:20:24,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:20:24,383 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:20:24,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:20:24,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:20:24,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:20:24,384 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:20:24,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:20:24,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:20:24,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:20:24,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:20:24,385 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:20:24,385 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:20:24,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:20:24,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:20:24,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:20:24,700 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:20:24,702 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:20:24,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2021-05-02 20:20:24,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08ba717bb/e331aa3f99f3443c8ef9bf49e49e3cc1/FLAGb51f207bd [2021-05-02 20:20:25,147 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:20:25,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2021-05-02 20:20:25,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08ba717bb/e331aa3f99f3443c8ef9bf49e49e3cc1/FLAGb51f207bd [2021-05-02 20:20:25,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08ba717bb/e331aa3f99f3443c8ef9bf49e49e3cc1 [2021-05-02 20:20:25,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:20:25,561 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:20:25,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:20:25,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:20:25,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:20:25,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:20:25" (1/1) ... [2021-05-02 20:20:25,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b6d462b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:25, skipping insertion in model container [2021-05-02 20:20:25,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:20:25" (1/1) ... [2021-05-02 20:20:25,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:20:25,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:20:25,681 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2021-05-02 20:20:25,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:20:25,700 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:20:25,708 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2021-05-02 20:20:25,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:20:25,757 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:20:25,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:25 WrapperNode [2021-05-02 20:20:25,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:20:25,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:20:25,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:20:25,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:20:25,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:25" (1/1) ... [2021-05-02 20:20:25,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:25" (1/1) ... [2021-05-02 20:20:25,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:25" (1/1) ... [2021-05-02 20:20:25,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:25" (1/1) ... [2021-05-02 20:20:25,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:25" (1/1) ... [2021-05-02 20:20:25,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:25" (1/1) ... [2021-05-02 20:20:25,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:25" (1/1) ... [2021-05-02 20:20:25,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:20:25,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:20:25,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:20:25,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:20:25,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:20:25,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:20:25,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:20:25,959 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:20:25,960 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:20:25,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:20:25,960 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:20:25,960 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:20:25,960 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:20:25,960 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:20:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:20:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:20:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:20:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:20:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:20:25,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:20:25,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:20:25,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:20:25,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:20:25,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:20:25,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:20:26,314 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:20:26,315 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:20:26,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:20:26 BoogieIcfgContainer [2021-05-02 20:20:26,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:20:26,316 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:20:26,316 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:20:26,317 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:20:26,319 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:20:26" (1/1) ... [2021-05-02 20:20:26,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:20:26 BasicIcfg [2021-05-02 20:20:26,340 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:20:26,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:20:26,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:20:26,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:20:26,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:20:25" (1/4) ... [2021-05-02 20:20:26,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d4870b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:20:26, skipping insertion in model container [2021-05-02 20:20:26,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:25" (2/4) ... [2021-05-02 20:20:26,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d4870b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:20:26, skipping insertion in model container [2021-05-02 20:20:26,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:20:26" (3/4) ... [2021-05-02 20:20:26,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d4870b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:20:26, skipping insertion in model container [2021-05-02 20:20:26,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:20:26" (4/4) ... [2021-05-02 20:20:26,346 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.cJordan [2021-05-02 20:20:26,349 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:20:26,352 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:20:26,369 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:20:26,393 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:20:26,393 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:20:26,393 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:20:26,393 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:20:26,393 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:20:26,393 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:20:26,393 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:20:26,393 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:20:26,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:20:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:20:26,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:26,416 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:26,416 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:26,421 INFO L82 PathProgramCache]: Analyzing trace with hash -282167495, now seen corresponding path program 1 times [2021-05-02 20:20:26,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:26,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301168493] [2021-05-02 20:20:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:26,525 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:26,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132725236] [2021-05-02 20:20:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:26,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 20:20:26,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:20:26,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:26,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301168493] [2021-05-02 20:20:26,688 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:26,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132725236] [2021-05-02 20:20:26,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132725236] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:20:26,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:20:26,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 20:20:26,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115801375] [2021-05-02 20:20:26,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 20:20:26,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:26,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 20:20:26,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:20:26,701 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:20:26,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:26,711 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-02 20:20:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 20:20:26,712 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2021-05-02 20:20:26,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:26,716 INFO L225 Difference]: With dead ends: 39 [2021-05-02 20:20:26,716 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:20:26,717 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:20:26,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:20:26,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 20:20:26,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:20:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-05-02 20:20:26,740 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2021-05-02 20:20:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:26,741 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-05-02 20:20:26,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:20:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-05-02 20:20:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:20:26,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:26,742 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:26,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 20:20:26,959 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:26,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:26,960 INFO L82 PathProgramCache]: Analyzing trace with hash -127828113, now seen corresponding path program 1 times [2021-05-02 20:20:26,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:26,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965842125] [2021-05-02 20:20:26,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:26,972 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:26,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790106738] [2021-05-02 20:20:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:27,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:20:27,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:27,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:27,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:27,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:27,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:27,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:20:27,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:27,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965842125] [2021-05-02 20:20:27,257 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:27,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790106738] [2021-05-02 20:20:27,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790106738] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:20:27,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:20:27,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:20:27,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354832104] [2021-05-02 20:20:27,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:20:27,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:27,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:20:27,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:20:27,274 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:20:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:27,285 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-05-02 20:20:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:20:27,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:20:27,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:27,286 INFO L225 Difference]: With dead ends: 36 [2021-05-02 20:20:27,286 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 20:20:27,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:20:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 20:20:27,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 20:20:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:20:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-05-02 20:20:27,292 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2021-05-02 20:20:27,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:27,292 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-05-02 20:20:27,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:20:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-05-02 20:20:27,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:20:27,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:27,293 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:27,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:27,500 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:27,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:27,500 INFO L82 PathProgramCache]: Analyzing trace with hash 365419517, now seen corresponding path program 1 times [2021-05-02 20:20:27,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:27,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285576053] [2021-05-02 20:20:27,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:27,534 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:27,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842270647] [2021-05-02 20:20:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:27,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:20:27,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:27,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:27,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:27,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:27,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:27,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:20:27,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:27,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285576053] [2021-05-02 20:20:27,725 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:27,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842270647] [2021-05-02 20:20:27,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842270647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:27,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:27,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:20:27,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563895711] [2021-05-02 20:20:27,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:20:27,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:27,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:20:27,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:20:27,727 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:20:27,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:27,802 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2021-05-02 20:20:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:20:27,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 20:20:27,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:27,807 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:20:27,808 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 20:20:27,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:20:27,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 20:20:27,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-05-02 20:20:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:20:27,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 20:20:27,825 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2021-05-02 20:20:27,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:27,826 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 20:20:27,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:20:27,826 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 20:20:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:20:27,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:27,829 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:28,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:28,045 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash 196514290, now seen corresponding path program 1 times [2021-05-02 20:20:28,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:28,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188981505] [2021-05-02 20:20:28,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:28,055 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:28,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865024386] [2021-05-02 20:20:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:28,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:20:28,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:28,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:20:28,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:28,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188981505] [2021-05-02 20:20:28,238 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:28,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865024386] [2021-05-02 20:20:28,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865024386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:28,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:28,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:20:28,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618751059] [2021-05-02 20:20:28,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:20:28,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:28,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:20:28,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:20:28,240 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:20:28,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:28,367 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2021-05-02 20:20:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:20:28,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 20:20:28,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:28,368 INFO L225 Difference]: With dead ends: 57 [2021-05-02 20:20:28,368 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 20:20:28,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:20:28,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 20:20:28,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-05-02 20:20:28,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:20:28,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-05-02 20:20:28,377 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2021-05-02 20:20:28,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:28,378 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-05-02 20:20:28,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:20:28,378 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-05-02 20:20:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:20:28,381 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:28,381 INFO L523 BasicCegarLoop]: trace histogram [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, 1] [2021-05-02 20:20:28,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:28,594 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:28,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:28,594 INFO L82 PathProgramCache]: Analyzing trace with hash 56558454, now seen corresponding path program 1 times [2021-05-02 20:20:28,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:28,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703539474] [2021-05-02 20:20:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:28,604 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:28,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870415731] [2021-05-02 20:20:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:28,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:20:28,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:28,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:20:28,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:28,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703539474] [2021-05-02 20:20:28,769 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:28,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870415731] [2021-05-02 20:20:28,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870415731] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:20:28,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:20:28,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:20:28,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16353841] [2021-05-02 20:20:28,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:20:28,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:28,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:20:28,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:20:28,771 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:20:28,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:28,801 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2021-05-02 20:20:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:20:28,802 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), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 20:20:28,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:28,803 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:20:28,803 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:20:28,804 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:20:28,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:20:28,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 20:20:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:20:28,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-05-02 20:20:28,807 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 39 [2021-05-02 20:20:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:28,807 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-05-02 20:20:28,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:20:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-05-02 20:20:28,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:20:28,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:28,808 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-05-02 20:20:29,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:29,021 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:29,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:29,021 INFO L82 PathProgramCache]: Analyzing trace with hash 578094295, now seen corresponding path program 1 times [2021-05-02 20:20:29,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:29,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010090196] [2021-05-02 20:20:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:29,031 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:29,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528232859] [2021-05-02 20:20:29,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:29,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:20:29,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:29,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:20:29,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:29,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010090196] [2021-05-02 20:20:29,196 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:29,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528232859] [2021-05-02 20:20:29,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528232859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:29,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:29,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:20:29,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870555799] [2021-05-02 20:20:29,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:20:29,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:29,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:20:29,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:20:29,197 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:20:29,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:29,293 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-05-02 20:20:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:20:29,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 20:20:29,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:29,294 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:20:29,294 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 20:20:29,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:20:29,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 20:20:29,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 20:20:29,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:20:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-05-02 20:20:29,299 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2021-05-02 20:20:29,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:29,299 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-05-02 20:20:29,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:20:29,300 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-05-02 20:20:29,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:20:29,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:29,300 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:29,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:29,513 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:29,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:29,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1581112078, now seen corresponding path program 1 times [2021-05-02 20:20:29,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:29,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944336161] [2021-05-02 20:20:29,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:29,522 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:29,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449358072] [2021-05-02 20:20:29,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:29,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:20:29,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:29,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-02 20:20:29,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:29,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944336161] [2021-05-02 20:20:29,733 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:29,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449358072] [2021-05-02 20:20:29,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449358072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:29,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:29,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:20:29,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994535624] [2021-05-02 20:20:29,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:20:29,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:29,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:20:29,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:20:29,735 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:20:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:29,825 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2021-05-02 20:20:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:20:29,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-02 20:20:29,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:29,828 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:20:29,828 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:20:29,828 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:20:29,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:20:29,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 20:20:29,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:20:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-05-02 20:20:29,845 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 46 [2021-05-02 20:20:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:29,846 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-05-02 20:20:29,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:20:29,846 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-05-02 20:20:29,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 20:20:29,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:29,847 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:30,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:30,053 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:30,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:30,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1942645143, now seen corresponding path program 1 times [2021-05-02 20:20:30,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:30,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509676023] [2021-05-02 20:20:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:30,065 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:30,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188397960] [2021-05-02 20:20:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:30,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:20:30,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:30,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 20:20:30,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:30,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509676023] [2021-05-02 20:20:30,257 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:30,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188397960] [2021-05-02 20:20:30,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188397960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:30,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:30,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:20:30,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357228278] [2021-05-02 20:20:30,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:20:30,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:30,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:20:30,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:20:30,259 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:20:32,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:32,459 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-05-02 20:20:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:20:32,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-02 20:20:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:32,463 INFO L225 Difference]: With dead ends: 64 [2021-05-02 20:20:32,463 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 20:20:32,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:20:32,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 20:20:32,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 20:20:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:20:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-05-02 20:20:32,467 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 51 [2021-05-02 20:20:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:32,467 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-05-02 20:20:32,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:20:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-05-02 20:20:32,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 20:20:32,468 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:32,468 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:32,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:20:32,669 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:32,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:32,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1782154901, now seen corresponding path program 1 times [2021-05-02 20:20:32,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:32,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865932122] [2021-05-02 20:20:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:32,685 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:32,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847661882] [2021-05-02 20:20:32,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:32,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:20:32,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:32,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-02 20:20:32,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:32,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865932122] [2021-05-02 20:20:32,829 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:32,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847661882] [2021-05-02 20:20:32,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847661882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:32,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:32,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:20:32,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131368814] [2021-05-02 20:20:32,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:20:32,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:32,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:20:32,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:20:32,830 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:20:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:32,926 INFO L93 Difference]: Finished difference Result 94 states and 129 transitions. [2021-05-02 20:20:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:20:32,926 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2021-05-02 20:20:32,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:32,928 INFO L225 Difference]: With dead ends: 94 [2021-05-02 20:20:32,928 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 20:20:32,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:20:32,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 20:20:32,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2021-05-02 20:20:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:20:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2021-05-02 20:20:32,940 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2021-05-02 20:20:32,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:32,941 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2021-05-02 20:20:32,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:20:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2021-05-02 20:20:32,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 20:20:32,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:32,942 INFO L523 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:33,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:33,161 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:33,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:33,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1573186588, now seen corresponding path program 1 times [2021-05-02 20:20:33,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:33,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023562716] [2021-05-02 20:20:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:33,168 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:33,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916500910] [2021-05-02 20:20:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:33,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:20:33,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:33,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 20:20:33,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:33,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023562716] [2021-05-02 20:20:33,417 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:33,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916500910] [2021-05-02 20:20:33,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916500910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:33,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:33,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:20:33,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443192979] [2021-05-02 20:20:33,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:20:33,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:33,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:20:33,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:20:33,419 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:20:33,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:33,493 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2021-05-02 20:20:33,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:20:33,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2021-05-02 20:20:33,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:33,496 INFO L225 Difference]: With dead ends: 99 [2021-05-02 20:20:33,496 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 20:20:33,496 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:20:33,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 20:20:33,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-02 20:20:33,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:20:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-05-02 20:20:33,521 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 60 [2021-05-02 20:20:33,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:33,522 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-05-02 20:20:33,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:20:33,522 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-05-02 20:20:33,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:20:33,526 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:33,526 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:33,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:33,742 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:33,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:33,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1491020248, now seen corresponding path program 1 times [2021-05-02 20:20:33,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:33,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389234481] [2021-05-02 20:20:33,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:33,750 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:33,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877026100] [2021-05-02 20:20:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:33,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:20:33,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:33,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-02 20:20:33,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:33,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389234481] [2021-05-02 20:20:33,984 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:33,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877026100] [2021-05-02 20:20:33,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877026100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:33,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:33,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:20:33,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813931744] [2021-05-02 20:20:33,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:20:33,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:33,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:20:33,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:20:33,986 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:20:34,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:34,135 INFO L93 Difference]: Finished difference Result 170 states and 243 transitions. [2021-05-02 20:20:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:20:34,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-02 20:20:34,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:34,137 INFO L225 Difference]: With dead ends: 170 [2021-05-02 20:20:34,137 INFO L226 Difference]: Without dead ends: 170 [2021-05-02 20:20:34,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:20:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-02 20:20:34,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2021-05-02 20:20:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 91 states have internal predecessors, (112), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-02 20:20:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 196 transitions. [2021-05-02 20:20:34,144 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 196 transitions. Word has length 61 [2021-05-02 20:20:34,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:34,144 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 196 transitions. [2021-05-02 20:20:34,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:20:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 196 transitions. [2021-05-02 20:20:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 20:20:34,145 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:34,145 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:34,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 20:20:34,361 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:34,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:34,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1948826973, now seen corresponding path program 1 times [2021-05-02 20:20:34,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:34,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129822952] [2021-05-02 20:20:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:34,370 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:34,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113563379] [2021-05-02 20:20:34,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:34,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:20:34,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:34,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 20:20:34,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:34,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129822952] [2021-05-02 20:20:34,571 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:34,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113563379] [2021-05-02 20:20:34,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113563379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:34,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:34,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:20:34,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696607886] [2021-05-02 20:20:34,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:20:34,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:34,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:20:34,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:20:34,572 INFO L87 Difference]: Start difference. First operand 142 states and 196 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:20:34,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:34,609 INFO L93 Difference]: Finished difference Result 142 states and 195 transitions. [2021-05-02 20:20:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:20:34,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2021-05-02 20:20:34,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:34,611 INFO L225 Difference]: With dead ends: 142 [2021-05-02 20:20:34,611 INFO L226 Difference]: Without dead ends: 142 [2021-05-02 20:20:34,611 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:20:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-02 20:20:34,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-02 20:20:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 91 states have internal predecessors, (111), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-02 20:20:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2021-05-02 20:20:34,616 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 62 [2021-05-02 20:20:34,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:34,616 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2021-05-02 20:20:34,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:20:34,616 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2021-05-02 20:20:34,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 20:20:34,617 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:34,617 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:34,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:34,825 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:34,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:34,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1844620331, now seen corresponding path program 1 times [2021-05-02 20:20:34,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:34,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167936111] [2021-05-02 20:20:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:34,836 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:34,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136928120] [2021-05-02 20:20:34,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:34,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:20:34,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:34,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 20:20:35,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:35,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167936111] [2021-05-02 20:20:35,038 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:35,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136928120] [2021-05-02 20:20:35,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136928120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:35,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:35,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:20:35,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078635208] [2021-05-02 20:20:35,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:20:35,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:35,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:20:35,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:20:35,039 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:20:35,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:35,111 INFO L93 Difference]: Finished difference Result 169 states and 222 transitions. [2021-05-02 20:20:35,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:20:35,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-05-02 20:20:35,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:35,113 INFO L225 Difference]: With dead ends: 169 [2021-05-02 20:20:35,113 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 20:20:35,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:20:35,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 20:20:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-05-02 20:20:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 108 states have internal predecessors, (130), 46 states have call successors, (46), 16 states have call predecessors, (46), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-02 20:20:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 220 transitions. [2021-05-02 20:20:35,118 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 220 transitions. Word has length 66 [2021-05-02 20:20:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:35,119 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 220 transitions. [2021-05-02 20:20:35,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:20:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 220 transitions. [2021-05-02 20:20:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 20:20:35,119 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:35,120 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:35,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:20:35,337 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:35,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:35,337 INFO L82 PathProgramCache]: Analyzing trace with hash 918639692, now seen corresponding path program 1 times [2021-05-02 20:20:35,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:35,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175078976] [2021-05-02 20:20:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:35,349 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:35,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113554595] [2021-05-02 20:20:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:20:35,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:35,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-02 20:20:35,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:35,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175078976] [2021-05-02 20:20:35,579 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:35,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113554595] [2021-05-02 20:20:35,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113554595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:35,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:35,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:20:35,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828347685] [2021-05-02 20:20:35,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:20:35,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:35,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:20:35,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:20:35,580 INFO L87 Difference]: Start difference. First operand 167 states and 220 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:20:35,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:35,835 INFO L93 Difference]: Finished difference Result 200 states and 267 transitions. [2021-05-02 20:20:35,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:20:35,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-05-02 20:20:35,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:35,837 INFO L225 Difference]: With dead ends: 200 [2021-05-02 20:20:35,837 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 20:20:35,838 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:20:35,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 20:20:35,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2021-05-02 20:20:35,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 126 states have (on average 1.2619047619047619) internal successors, (159), 133 states have internal predecessors, (159), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (50), 45 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 20:20:35,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 262 transitions. [2021-05-02 20:20:35,847 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 262 transitions. Word has length 68 [2021-05-02 20:20:35,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:35,847 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 262 transitions. [2021-05-02 20:20:35,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:20:35,847 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 262 transitions. [2021-05-02 20:20:35,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:20:35,848 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:35,848 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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] [2021-05-02 20:20:36,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:36,057 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:36,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:36,057 INFO L82 PathProgramCache]: Analyzing trace with hash -210356579, now seen corresponding path program 2 times [2021-05-02 20:20:36,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:36,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67641698] [2021-05-02 20:20:36,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:36,063 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:36,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130304087] [2021-05-02 20:20:36,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:36,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:20:36,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:36,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:20:36,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:36,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 20:20:36,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:36,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67641698] [2021-05-02 20:20:36,329 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:36,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130304087] [2021-05-02 20:20:36,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130304087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:36,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:36,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:20:36,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774704591] [2021-05-02 20:20:36,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:20:36,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:36,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:20:36,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:20:36,331 INFO L87 Difference]: Start difference. First operand 196 states and 262 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:20:36,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:36,491 INFO L93 Difference]: Finished difference Result 222 states and 299 transitions. [2021-05-02 20:20:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:20:36,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2021-05-02 20:20:36,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:36,493 INFO L225 Difference]: With dead ends: 222 [2021-05-02 20:20:36,493 INFO L226 Difference]: Without dead ends: 222 [2021-05-02 20:20:36,493 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:20:36,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-02 20:20:36,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 219. [2021-05-02 20:20:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 138 states have (on average 1.2681159420289856) internal successors, (175), 146 states have internal predecessors, (175), 62 states have call successors, (62), 19 states have call predecessors, (62), 18 states have return successors, (59), 53 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 20:20:36,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 296 transitions. [2021-05-02 20:20:36,499 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 296 transitions. Word has length 73 [2021-05-02 20:20:36,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:36,499 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 296 transitions. [2021-05-02 20:20:36,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:20:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 296 transitions. [2021-05-02 20:20:36,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 20:20:36,500 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:36,500 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2021-05-02 20:20:36,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 20:20:36,713 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:36,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:36,714 INFO L82 PathProgramCache]: Analyzing trace with hash 952478412, now seen corresponding path program 3 times [2021-05-02 20:20:36,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:36,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443127789] [2021-05-02 20:20:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:36,719 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:36,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289792447] [2021-05-02 20:20:36,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:36,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:20:36,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:36,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 20:20:36,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:36,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 20:20:37,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:37,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443127789] [2021-05-02 20:20:37,293 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:37,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289792447] [2021-05-02 20:20:37,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289792447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:37,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:37,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:20:37,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412892443] [2021-05-02 20:20:37,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:20:37,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:37,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:20:37,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:20:37,295 INFO L87 Difference]: Start difference. First operand 219 states and 296 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:20:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:37,621 INFO L93 Difference]: Finished difference Result 226 states and 302 transitions. [2021-05-02 20:20:37,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:20:37,621 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2021-05-02 20:20:37,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:37,623 INFO L225 Difference]: With dead ends: 226 [2021-05-02 20:20:37,623 INFO L226 Difference]: Without dead ends: 226 [2021-05-02 20:20:37,623 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:20:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-02 20:20:37,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2021-05-02 20:20:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 141 states have (on average 1.2624113475177305) internal successors, (178), 149 states have internal predecessors, (178), 62 states have call successors, (62), 20 states have call predecessors, (62), 19 states have return successors, (59), 53 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 20:20:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 299 transitions. [2021-05-02 20:20:37,628 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 299 transitions. Word has length 78 [2021-05-02 20:20:37,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:37,628 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 299 transitions. [2021-05-02 20:20:37,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:20:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 299 transitions. [2021-05-02 20:20:37,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 20:20:37,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:37,629 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 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] [2021-05-02 20:20:37,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:20:37,845 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:37,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:37,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1350616622, now seen corresponding path program 2 times [2021-05-02 20:20:37,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:37,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113809319] [2021-05-02 20:20:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:37,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:37,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820748961] [2021-05-02 20:20:37,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:37,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:20:37,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:37,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 20:20:37,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:37,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:39,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:39,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:39,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:39,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:39,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 41 proven. 36 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-02 20:20:39,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:39,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113809319] [2021-05-02 20:20:39,414 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:39,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820748961] [2021-05-02 20:20:39,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820748961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:39,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:39,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:20:39,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160760240] [2021-05-02 20:20:39,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:20:39,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:39,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:20:39,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:20:39,418 INFO L87 Difference]: Start difference. First operand 223 states and 299 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 20:20:40,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:40,068 INFO L93 Difference]: Finished difference Result 235 states and 315 transitions. [2021-05-02 20:20:40,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:20:40,068 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 82 [2021-05-02 20:20:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:40,071 INFO L225 Difference]: With dead ends: 235 [2021-05-02 20:20:40,071 INFO L226 Difference]: Without dead ends: 235 [2021-05-02 20:20:40,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 448.9ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:20:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-02 20:20:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 228. [2021-05-02 20:20:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 144 states have (on average 1.2569444444444444) internal successors, (181), 153 states have internal predecessors, (181), 63 states have call successors, (63), 21 states have call predecessors, (63), 20 states have return successors, (60), 53 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:20:40,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 304 transitions. [2021-05-02 20:20:40,079 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 304 transitions. Word has length 82 [2021-05-02 20:20:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:40,079 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 304 transitions. [2021-05-02 20:20:40,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 20:20:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 304 transitions. [2021-05-02 20:20:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 20:20:40,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:40,080 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1] [2021-05-02 20:20:40,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 20:20:40,297 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:40,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:40,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1080401827, now seen corresponding path program 1 times [2021-05-02 20:20:40,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:40,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360878343] [2021-05-02 20:20:40,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:40,303 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:40,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783984181] [2021-05-02 20:20:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:40,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:20:40,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:40,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:40,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:40,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:40,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:40,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:40,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:40,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:40,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:40,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:40,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:40,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:40,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:40,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:40,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 20:20:40,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:40,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360878343] [2021-05-02 20:20:40,629 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:40,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783984181] [2021-05-02 20:20:40,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783984181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:40,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:40,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:20:40,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388520915] [2021-05-02 20:20:40,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:20:40,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:40,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:20:40,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:20:40,634 INFO L87 Difference]: Start difference. First operand 228 states and 304 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:20:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:40,741 INFO L93 Difference]: Finished difference Result 231 states and 307 transitions. [2021-05-02 20:20:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:20:40,741 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2021-05-02 20:20:40,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:40,742 INFO L225 Difference]: With dead ends: 231 [2021-05-02 20:20:40,742 INFO L226 Difference]: Without dead ends: 231 [2021-05-02 20:20:40,742 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:20:40,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-02 20:20:40,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-05-02 20:20:40,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 147 states have (on average 1.251700680272109) internal successors, (184), 156 states have internal predecessors, (184), 63 states have call successors, (63), 21 states have call predecessors, (63), 20 states have return successors, (60), 53 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:20:40,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 307 transitions. [2021-05-02 20:20:40,750 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 307 transitions. Word has length 83 [2021-05-02 20:20:40,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:40,752 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 307 transitions. [2021-05-02 20:20:40,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:20:40,752 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 307 transitions. [2021-05-02 20:20:40,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 20:20:40,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:40,753 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1] [2021-05-02 20:20:40,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 20:20:40,969 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:40,969 INFO L82 PathProgramCache]: Analyzing trace with hash 900405455, now seen corresponding path program 1 times [2021-05-02 20:20:40,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:40,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085872633] [2021-05-02 20:20:40,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:40,975 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:40,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338658016] [2021-05-02 20:20:40,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:41,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 20:20:41,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:41,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-05-02 20:20:41,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:41,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085872633] [2021-05-02 20:20:41,368 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:41,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338658016] [2021-05-02 20:20:41,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338658016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:41,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:41,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:20:41,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309584179] [2021-05-02 20:20:41,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:20:41,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:41,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:20:41,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:20:41,371 INFO L87 Difference]: Start difference. First operand 231 states and 307 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:20:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:41,766 INFO L93 Difference]: Finished difference Result 261 states and 350 transitions. [2021-05-02 20:20:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:20:41,766 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 84 [2021-05-02 20:20:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:41,768 INFO L225 Difference]: With dead ends: 261 [2021-05-02 20:20:41,768 INFO L226 Difference]: Without dead ends: 260 [2021-05-02 20:20:41,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 252.1ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:20:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-02 20:20:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2021-05-02 20:20:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 162 states have (on average 1.2592592592592593) internal successors, (204), 172 states have internal predecessors, (204), 72 states have call successors, (72), 23 states have call predecessors, (72), 22 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 20:20:41,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 345 transitions. [2021-05-02 20:20:41,774 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 345 transitions. Word has length 84 [2021-05-02 20:20:41,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:41,774 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 345 transitions. [2021-05-02 20:20:41,774 INFO L481 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:20:41,774 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 345 transitions. [2021-05-02 20:20:41,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:20:41,774 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:41,775 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 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] [2021-05-02 20:20:42,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 20:20:42,004 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:42,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2138218929, now seen corresponding path program 2 times [2021-05-02 20:20:42,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:42,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373389902] [2021-05-02 20:20:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:42,013 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:42,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100250118] [2021-05-02 20:20:42,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:42,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:20:42,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:42,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:20:42,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:42,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 20:20:42,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:42,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373389902] [2021-05-02 20:20:42,324 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:42,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100250118] [2021-05-02 20:20:42,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100250118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:42,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:42,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:20:42,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952723611] [2021-05-02 20:20:42,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:20:42,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:42,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:20:42,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:20:42,325 INFO L87 Difference]: Start difference. First operand 257 states and 345 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:20:42,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:42,568 INFO L93 Difference]: Finished difference Result 292 states and 378 transitions. [2021-05-02 20:20:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:20:42,569 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 87 [2021-05-02 20:20:42,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:42,570 INFO L225 Difference]: With dead ends: 292 [2021-05-02 20:20:42,570 INFO L226 Difference]: Without dead ends: 292 [2021-05-02 20:20:42,570 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:20:42,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-05-02 20:20:42,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2021-05-02 20:20:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 187 states have (on average 1.2299465240641712) internal successors, (230), 196 states have internal predecessors, (230), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:20:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 377 transitions. [2021-05-02 20:20:42,576 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 377 transitions. Word has length 87 [2021-05-02 20:20:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:42,576 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 377 transitions. [2021-05-02 20:20:42,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:20:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 377 transitions. [2021-05-02 20:20:42,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:20:42,578 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:42,579 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 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] [2021-05-02 20:20:42,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 20:20:42,785 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:42,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:42,785 INFO L82 PathProgramCache]: Analyzing trace with hash 118626568, now seen corresponding path program 1 times [2021-05-02 20:20:42,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:42,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638783974] [2021-05-02 20:20:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:42,791 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:42,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844153759] [2021-05-02 20:20:42,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:42,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:20:42,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:42,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:42,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 20:20:43,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:43,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638783974] [2021-05-02 20:20:43,089 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:43,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844153759] [2021-05-02 20:20:43,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844153759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:43,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:43,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:20:43,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084785882] [2021-05-02 20:20:43,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:20:43,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:43,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:20:43,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:20:43,090 INFO L87 Difference]: Start difference. First operand 291 states and 377 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:20:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:43,180 INFO L93 Difference]: Finished difference Result 293 states and 377 transitions. [2021-05-02 20:20:43,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:20:43,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2021-05-02 20:20:43,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:43,182 INFO L225 Difference]: With dead ends: 293 [2021-05-02 20:20:43,182 INFO L226 Difference]: Without dead ends: 293 [2021-05-02 20:20:43,182 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:20:43,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-02 20:20:43,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-05-02 20:20:43,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 189 states have (on average 1.216931216931217) internal successors, (230), 198 states have internal predecessors, (230), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:20:43,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 377 transitions. [2021-05-02 20:20:43,188 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 377 transitions. Word has length 89 [2021-05-02 20:20:43,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:43,188 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 377 transitions. [2021-05-02 20:20:43,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:20:43,189 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 377 transitions. [2021-05-02 20:20:43,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 20:20:43,189 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:43,189 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-05-02 20:20:43,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 20:20:43,401 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:43,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:43,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1881160278, now seen corresponding path program 2 times [2021-05-02 20:20:43,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:43,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375108735] [2021-05-02 20:20:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:43,407 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:43,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790842383] [2021-05-02 20:20:43,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:43,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:20:43,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:43,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:20:43,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:43,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-05-02 20:20:43,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:43,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375108735] [2021-05-02 20:20:43,627 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:43,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790842383] [2021-05-02 20:20:43,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790842383] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:20:43,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:20:43,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:20:43,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880977110] [2021-05-02 20:20:43,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:20:43,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:43,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:20:43,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:20:43,628 INFO L87 Difference]: Start difference. First operand 293 states and 377 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 20:20:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:43,680 INFO L93 Difference]: Finished difference Result 343 states and 457 transitions. [2021-05-02 20:20:43,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:20:43,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2021-05-02 20:20:43,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:43,681 INFO L225 Difference]: With dead ends: 343 [2021-05-02 20:20:43,682 INFO L226 Difference]: Without dead ends: 343 [2021-05-02 20:20:43,682 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:20:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-05-02 20:20:43,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 310. [2021-05-02 20:20:43,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 200 states have (on average 1.225) internal successors, (245), 208 states have internal predecessors, (245), 81 states have call successors, (81), 29 states have call predecessors, (81), 28 states have return successors, (78), 72 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 20:20:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 404 transitions. [2021-05-02 20:20:43,690 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 404 transitions. Word has length 93 [2021-05-02 20:20:43,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:43,690 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 404 transitions. [2021-05-02 20:20:43,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 20:20:43,690 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 404 transitions. [2021-05-02 20:20:43,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 20:20:43,691 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:43,691 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:43,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:43,901 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:43,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:43,901 INFO L82 PathProgramCache]: Analyzing trace with hash 653404933, now seen corresponding path program 1 times [2021-05-02 20:20:43,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:43,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340443903] [2021-05-02 20:20:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:43,906 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:43,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307818893] [2021-05-02 20:20:43,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:44,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-02 20:20:44,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:44,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 53 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-02 20:20:44,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:44,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340443903] [2021-05-02 20:20:44,558 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:44,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307818893] [2021-05-02 20:20:44,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307818893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:44,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:44,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:20:44,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800190172] [2021-05-02 20:20:44,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:20:44,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:44,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:20:44,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:20:44,559 INFO L87 Difference]: Start difference. First operand 310 states and 404 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 20:20:47,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:47,350 INFO L93 Difference]: Finished difference Result 318 states and 411 transitions. [2021-05-02 20:20:47,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:20:47,351 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 101 [2021-05-02 20:20:47,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:47,352 INFO L225 Difference]: With dead ends: 318 [2021-05-02 20:20:47,352 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 20:20:47,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 435.7ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:20:47,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 20:20:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2021-05-02 20:20:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 203 states have (on average 1.2216748768472907) internal successors, (248), 211 states have internal predecessors, (248), 81 states have call successors, (81), 30 states have call predecessors, (81), 29 states have return successors, (78), 72 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 20:20:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 407 transitions. [2021-05-02 20:20:47,358 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 407 transitions. Word has length 101 [2021-05-02 20:20:47,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:47,358 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 407 transitions. [2021-05-02 20:20:47,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 20:20:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 407 transitions. [2021-05-02 20:20:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 20:20:47,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:47,359 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:47,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 20:20:47,573 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:47,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1232145013, now seen corresponding path program 3 times [2021-05-02 20:20:47,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:47,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736740892] [2021-05-02 20:20:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:47,578 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:47,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424346875] [2021-05-02 20:20:47,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:47,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:20:47,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:47,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:20:47,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:47,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:47,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:48,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:48,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:48,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:48,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:48,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:48,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:48,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:48,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:48,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:48,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 67 proven. 56 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-05-02 20:20:50,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:50,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736740892] [2021-05-02 20:20:50,731 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:50,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424346875] [2021-05-02 20:20:50,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424346875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:50,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:50,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:20:50,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198473371] [2021-05-02 20:20:50,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:20:50,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:50,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:20:50,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=203, Unknown=1, NotChecked=0, Total=240 [2021-05-02 20:20:50,733 INFO L87 Difference]: Start difference. First operand 314 states and 407 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 20:20:53,366 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 20:20:59,553 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 20:21:03,181 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 31 DAG size of output: 16 [2021-05-02 20:21:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:03,688 INFO L93 Difference]: Finished difference Result 326 states and 423 transitions. [2021-05-02 20:21:03,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:21:03,688 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-02 20:21:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:03,690 INFO L225 Difference]: With dead ends: 326 [2021-05-02 20:21:03,690 INFO L226 Difference]: Without dead ends: 326 [2021-05-02 20:21:03,690 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 7924.9ms TimeCoverageRelationStatistics Valid=68, Invalid=393, Unknown=1, NotChecked=0, Total=462 [2021-05-02 20:21:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-02 20:21:03,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 319. [2021-05-02 20:21:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 206 states have (on average 1.2184466019417475) internal successors, (251), 215 states have internal predecessors, (251), 82 states have call successors, (82), 31 states have call predecessors, (82), 30 states have return successors, (79), 72 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 20:21:03,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 412 transitions. [2021-05-02 20:21:03,696 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 412 transitions. Word has length 105 [2021-05-02 20:21:03,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:03,696 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 412 transitions. [2021-05-02 20:21:03,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 20:21:03,697 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 412 transitions. [2021-05-02 20:21:03,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 20:21:03,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:03,697 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:03,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:03,898 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:03,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:03,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1212495288, now seen corresponding path program 2 times [2021-05-02 20:21:03,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:03,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216654484] [2021-05-02 20:21:03,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:03,904 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:03,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474990750] [2021-05-02 20:21:03,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:03,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:21:03,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:03,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 20:21:03,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:03,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:03,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 69 proven. 69 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-05-02 20:21:04,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:04,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216654484] [2021-05-02 20:21:04,425 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:04,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474990750] [2021-05-02 20:21:04,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474990750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:04,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:04,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:21:04,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304021966] [2021-05-02 20:21:04,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:21:04,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:04,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:21:04,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:21:04,426 INFO L87 Difference]: Start difference. First operand 319 states and 412 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2021-05-02 20:21:05,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:05,108 INFO L93 Difference]: Finished difference Result 351 states and 456 transitions. [2021-05-02 20:21:05,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:21:05,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 107 [2021-05-02 20:21:05,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:05,110 INFO L225 Difference]: With dead ends: 351 [2021-05-02 20:21:05,110 INFO L226 Difference]: Without dead ends: 350 [2021-05-02 20:21:05,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 410.2ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-05-02 20:21:05,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-02 20:21:05,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 345. [2021-05-02 20:21:05,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 221 states have (on average 1.2217194570135748) internal successors, (270), 231 states have internal predecessors, (270), 91 states have call successors, (91), 33 states have call predecessors, (91), 32 states have return successors, (88), 80 states have call predecessors, (88), 88 states have call successors, (88) [2021-05-02 20:21:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 449 transitions. [2021-05-02 20:21:05,117 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 449 transitions. Word has length 107 [2021-05-02 20:21:05,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:05,118 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 449 transitions. [2021-05-02 20:21:05,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2021-05-02 20:21:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 449 transitions. [2021-05-02 20:21:05,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 20:21:05,119 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:05,119 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:05,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 20:21:05,333 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:05,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:05,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2102989309, now seen corresponding path program 2 times [2021-05-02 20:21:05,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:05,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375750717] [2021-05-02 20:21:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:05,342 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:05,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639443804] [2021-05-02 20:21:05,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:05,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:21:05,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:05,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 20:21:05,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:05,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 47 proven. 52 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-05-02 20:21:05,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:05,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375750717] [2021-05-02 20:21:05,738 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:05,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639443804] [2021-05-02 20:21:05,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639443804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:05,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:05,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:21:05,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510108879] [2021-05-02 20:21:05,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:21:05,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:05,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:21:05,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:21:05,742 INFO L87 Difference]: Start difference. First operand 345 states and 449 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 20:21:06,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:06,420 INFO L93 Difference]: Finished difference Result 406 states and 543 transitions. [2021-05-02 20:21:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:21:06,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 109 [2021-05-02 20:21:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:06,422 INFO L225 Difference]: With dead ends: 406 [2021-05-02 20:21:06,422 INFO L226 Difference]: Without dead ends: 406 [2021-05-02 20:21:06,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-05-02 20:21:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-02 20:21:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 367. [2021-05-02 20:21:06,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 233 states have (on average 1.2274678111587982) internal successors, (286), 243 states have internal predecessors, (286), 99 states have call successors, (99), 35 states have call predecessors, (99), 34 states have return successors, (96), 88 states have call predecessors, (96), 96 states have call successors, (96) [2021-05-02 20:21:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 481 transitions. [2021-05-02 20:21:06,430 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 481 transitions. Word has length 109 [2021-05-02 20:21:06,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:06,430 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 481 transitions. [2021-05-02 20:21:06,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 20:21:06,430 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 481 transitions. [2021-05-02 20:21:06,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:21:06,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:06,431 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:06,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 20:21:06,633 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:06,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1392800366, now seen corresponding path program 2 times [2021-05-02 20:21:06,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:06,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907987442] [2021-05-02 20:21:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:06,640 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:06,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603927361] [2021-05-02 20:21:06,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:06,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:21:06,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:06,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:21:06,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:06,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 221 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:21:06,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:06,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907987442] [2021-05-02 20:21:06,898 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:06,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603927361] [2021-05-02 20:21:06,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603927361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:06,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:06,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:21:06,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920015399] [2021-05-02 20:21:06,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:21:06,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:06,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:21:06,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:21:06,899 INFO L87 Difference]: Start difference. First operand 367 states and 481 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 20:21:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:07,040 INFO L93 Difference]: Finished difference Result 414 states and 523 transitions. [2021-05-02 20:21:07,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:21:07,045 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 110 [2021-05-02 20:21:07,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:07,046 INFO L225 Difference]: With dead ends: 414 [2021-05-02 20:21:07,047 INFO L226 Difference]: Without dead ends: 414 [2021-05-02 20:21:07,047 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:21:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-02 20:21:07,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 413. [2021-05-02 20:21:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 267 states have (on average 1.202247191011236) internal successors, (321), 276 states have internal predecessors, (321), 102 states have call successors, (102), 44 states have call predecessors, (102), 43 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-02 20:21:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 522 transitions. [2021-05-02 20:21:07,056 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 522 transitions. Word has length 110 [2021-05-02 20:21:07,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:07,056 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 522 transitions. [2021-05-02 20:21:07,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 20:21:07,056 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 522 transitions. [2021-05-02 20:21:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 20:21:07,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:07,057 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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, 1, 1, 1] [2021-05-02 20:21:07,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 20:21:07,269 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:07,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:07,269 INFO L82 PathProgramCache]: Analyzing trace with hash -194014662, now seen corresponding path program 3 times [2021-05-02 20:21:07,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:07,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678278322] [2021-05-02 20:21:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:07,273 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:07,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919639965] [2021-05-02 20:21:07,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:07,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:21:07,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:07,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:21:07,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:07,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-02 20:21:07,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:07,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678278322] [2021-05-02 20:21:07,496 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:07,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919639965] [2021-05-02 20:21:07,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919639965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:07,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:07,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:21:07,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630689722] [2021-05-02 20:21:07,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:21:07,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:07,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:21:07,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:21:07,514 INFO L87 Difference]: Start difference. First operand 413 states and 522 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-02 20:21:07,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:07,778 INFO L93 Difference]: Finished difference Result 574 states and 785 transitions. [2021-05-02 20:21:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:21:07,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 111 [2021-05-02 20:21:07,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:07,780 INFO L225 Difference]: With dead ends: 574 [2021-05-02 20:21:07,780 INFO L226 Difference]: Without dead ends: 574 [2021-05-02 20:21:07,781 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:21:07,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-05-02 20:21:07,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 457. [2021-05-02 20:21:07,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 297 states have (on average 1.2222222222222223) internal successors, (363), 304 states have internal predecessors, (363), 116 states have call successors, (116), 44 states have call predecessors, (116), 43 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-02 20:21:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 592 transitions. [2021-05-02 20:21:07,790 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 592 transitions. Word has length 111 [2021-05-02 20:21:07,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:07,791 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 592 transitions. [2021-05-02 20:21:07,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-02 20:21:07,791 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 592 transitions. [2021-05-02 20:21:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 20:21:07,791 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:07,791 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:07,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 20:21:07,992 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:07,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:07,992 INFO L82 PathProgramCache]: Analyzing trace with hash -793672821, now seen corresponding path program 2 times [2021-05-02 20:21:07,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:07,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873952776] [2021-05-02 20:21:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:07,997 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:07,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731555462] [2021-05-02 20:21:07,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:08,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:21:08,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:08,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:21:08,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:08,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 222 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:21:08,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:08,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873952776] [2021-05-02 20:21:08,223 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:08,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731555462] [2021-05-02 20:21:08,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731555462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:08,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:08,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:21:08,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319968341] [2021-05-02 20:21:08,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:21:08,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:08,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:21:08,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:21:08,225 INFO L87 Difference]: Start difference. First operand 457 states and 592 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 20:21:08,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:08,362 INFO L93 Difference]: Finished difference Result 459 states and 591 transitions. [2021-05-02 20:21:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:21:08,362 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 112 [2021-05-02 20:21:08,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:08,364 INFO L225 Difference]: With dead ends: 459 [2021-05-02 20:21:08,364 INFO L226 Difference]: Without dead ends: 459 [2021-05-02 20:21:08,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:21:08,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-05-02 20:21:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2021-05-02 20:21:08,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 299 states have (on average 1.2107023411371238) internal successors, (362), 306 states have internal predecessors, (362), 116 states have call successors, (116), 44 states have call predecessors, (116), 43 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-02 20:21:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 591 transitions. [2021-05-02 20:21:08,372 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 591 transitions. Word has length 112 [2021-05-02 20:21:08,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:08,372 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 591 transitions. [2021-05-02 20:21:08,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 20:21:08,372 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 591 transitions. [2021-05-02 20:21:08,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 20:21:08,373 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:08,373 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-05-02 20:21:08,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 20:21:08,588 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:08,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:08,589 INFO L82 PathProgramCache]: Analyzing trace with hash 791718745, now seen corresponding path program 3 times [2021-05-02 20:21:08,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:08,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975193821] [2021-05-02 20:21:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:08,594 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:08,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197327655] [2021-05-02 20:21:08,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:08,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:21:08,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:08,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:21:08,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:08,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:21:08,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:08,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975193821] [2021-05-02 20:21:08,849 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:08,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197327655] [2021-05-02 20:21:08,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197327655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:08,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:08,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:21:08,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568288559] [2021-05-02 20:21:08,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:21:08,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:08,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:21:08,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:21:08,850 INFO L87 Difference]: Start difference. First operand 459 states and 591 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 20:21:09,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:09,039 INFO L93 Difference]: Finished difference Result 533 states and 663 transitions. [2021-05-02 20:21:09,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:21:09,039 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2021-05-02 20:21:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:09,041 INFO L225 Difference]: With dead ends: 533 [2021-05-02 20:21:09,041 INFO L226 Difference]: Without dead ends: 533 [2021-05-02 20:21:09,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:21:09,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-05-02 20:21:09,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 523. [2021-05-02 20:21:09,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 344 states have (on average 1.191860465116279) internal successors, (410), 351 states have internal predecessors, (410), 124 states have call successors, (124), 55 states have call predecessors, (124), 54 states have return successors, (120), 116 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 20:21:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 654 transitions. [2021-05-02 20:21:09,053 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 654 transitions. Word has length 116 [2021-05-02 20:21:09,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:09,053 INFO L480 AbstractCegarLoop]: Abstraction has 523 states and 654 transitions. [2021-05-02 20:21:09,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 20:21:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 654 transitions. [2021-05-02 20:21:09,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-02 20:21:09,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:09,054 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:09,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:09,270 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:09,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:09,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1178507345, now seen corresponding path program 3 times [2021-05-02 20:21:09,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:09,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370599691] [2021-05-02 20:21:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:09,275 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:09,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311692805] [2021-05-02 20:21:09,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:09,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:21:09,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:09,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-02 20:21:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:09,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-05-02 20:21:09,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:09,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370599691] [2021-05-02 20:21:09,830 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:09,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311692805] [2021-05-02 20:21:09,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311692805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:09,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:09,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:21:09,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058534510] [2021-05-02 20:21:09,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:21:09,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:09,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:21:09,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:21:09,831 INFO L87 Difference]: Start difference. First operand 523 states and 654 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2021-05-02 20:21:10,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:10,354 INFO L93 Difference]: Finished difference Result 568 states and 711 transitions. [2021-05-02 20:21:10,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:21:10,354 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 123 [2021-05-02 20:21:10,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:10,356 INFO L225 Difference]: With dead ends: 568 [2021-05-02 20:21:10,356 INFO L226 Difference]: Without dead ends: 568 [2021-05-02 20:21:10,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 361.5ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:21:10,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-05-02 20:21:10,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 560. [2021-05-02 20:21:10,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 365 states have (on average 1.1917808219178083) internal successors, (435), 372 states have internal predecessors, (435), 136 states have call successors, (136), 59 states have call predecessors, (136), 58 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2021-05-02 20:21:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 703 transitions. [2021-05-02 20:21:10,364 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 703 transitions. Word has length 123 [2021-05-02 20:21:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:10,364 INFO L480 AbstractCegarLoop]: Abstraction has 560 states and 703 transitions. [2021-05-02 20:21:10,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2021-05-02 20:21:10,365 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 703 transitions. [2021-05-02 20:21:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 20:21:10,365 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:10,365 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:10,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 20:21:10,580 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:10,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:10,581 INFO L82 PathProgramCache]: Analyzing trace with hash -351372628, now seen corresponding path program 4 times [2021-05-02 20:21:10,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:10,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755593484] [2021-05-02 20:21:10,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:10,588 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:10,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848206203] [2021-05-02 20:21:10,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:10,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:21:10,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:10,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 20:21:10,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:10,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:10,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:11,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:11,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:11,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:11,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:11,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:11,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:11,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:11,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:11,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:11,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:11,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:11,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:11,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:11,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 96 proven. 93 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-05-02 20:21:11,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:11,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755593484] [2021-05-02 20:21:11,261 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:11,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848206203] [2021-05-02 20:21:11,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848206203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:11,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:11,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:21:11,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606292311] [2021-05-02 20:21:11,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:21:11,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:11,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:21:11,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:21:11,263 INFO L87 Difference]: Start difference. First operand 560 states and 703 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 20:21:18,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:18,020 INFO L93 Difference]: Finished difference Result 573 states and 714 transitions. [2021-05-02 20:21:18,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:21:18,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) Word has length 124 [2021-05-02 20:21:18,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:18,022 INFO L225 Difference]: With dead ends: 573 [2021-05-02 20:21:18,023 INFO L226 Difference]: Without dead ends: 573 [2021-05-02 20:21:18,023 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 490.1ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:21:18,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-05-02 20:21:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 568. [2021-05-02 20:21:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 371 states have (on average 1.1886792452830188) internal successors, (441), 378 states have internal predecessors, (441), 136 states have call successors, (136), 61 states have call predecessors, (136), 60 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2021-05-02 20:21:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 709 transitions. [2021-05-02 20:21:18,031 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 709 transitions. Word has length 124 [2021-05-02 20:21:18,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:18,031 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 709 transitions. [2021-05-02 20:21:18,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 20:21:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 709 transitions. [2021-05-02 20:21:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 20:21:18,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:18,032 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:18,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-02 20:21:18,246 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:18,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:18,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1864178098, now seen corresponding path program 4 times [2021-05-02 20:21:18,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:18,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629744217] [2021-05-02 20:21:18,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:18,251 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:18,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570255443] [2021-05-02 20:21:18,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:18,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:21:18,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:18,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 20:21:18,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:18,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 92 proven. 123 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2021-05-02 20:21:18,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:18,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629744217] [2021-05-02 20:21:18,845 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:18,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570255443] [2021-05-02 20:21:18,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570255443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:18,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:18,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:21:18,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924095831] [2021-05-02 20:21:18,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:21:18,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:18,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:21:18,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:21:18,846 INFO L87 Difference]: Start difference. First operand 568 states and 709 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 20:21:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:19,434 INFO L93 Difference]: Finished difference Result 575 states and 715 transitions. [2021-05-02 20:21:19,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:21:19,435 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 128 [2021-05-02 20:21:19,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:19,437 INFO L225 Difference]: With dead ends: 575 [2021-05-02 20:21:19,437 INFO L226 Difference]: Without dead ends: 573 [2021-05-02 20:21:19,437 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 389.8ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-05-02 20:21:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-05-02 20:21:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 570. [2021-05-02 20:21:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 373 states have (on average 1.1849865951742626) internal successors, (442), 379 states have internal predecessors, (442), 136 states have call successors, (136), 62 states have call predecessors, (136), 60 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2021-05-02 20:21:19,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 710 transitions. [2021-05-02 20:21:19,445 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 710 transitions. Word has length 128 [2021-05-02 20:21:19,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:19,445 INFO L480 AbstractCegarLoop]: Abstraction has 570 states and 710 transitions. [2021-05-02 20:21:19,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 20:21:19,445 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 710 transitions. [2021-05-02 20:21:19,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 20:21:19,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:19,446 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:19,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:19,661 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:19,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:19,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1703433466, now seen corresponding path program 5 times [2021-05-02 20:21:19,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:19,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848236940] [2021-05-02 20:21:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:19,665 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:19,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741814093] [2021-05-02 20:21:19,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true