/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/egcd3-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:33:01,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:33:01,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:33:01,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:33:01,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:33:01,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:33:01,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:33:01,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:33:01,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:33:01,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:33:01,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:33:01,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:33:01,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:33:01,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:33:01,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:33:01,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:33:01,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:33:01,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:33:01,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:33:01,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:33:01,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:33:01,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:33:01,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:33:01,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:33:01,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:33:01,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:33:01,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:33:01,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:33:01,825 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:33:01,843 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:33:01,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:33:01,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:33:01,844 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:33:01,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:33:01,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:33:01,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:33:01,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:33:01,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:33:01,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:33:01,845 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:33:01,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:33:01,846 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:33:01,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:33:01,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:33:01,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:33:01,846 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:33:01,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:33:01,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:33:01,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:33:01,847 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:33:01,848 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:33:01,848 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:33:02,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:33:02,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:33:02,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:33:02,069 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:33:02,070 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:33:02,070 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2021-05-02 20:33:02,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aedd424a/4944c0006a354d0c9f08bd47fafd8a0a/FLAGcaf885df6 [2021-05-02 20:33:02,464 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:33:02,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2021-05-02 20:33:02,469 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aedd424a/4944c0006a354d0c9f08bd47fafd8a0a/FLAGcaf885df6 [2021-05-02 20:33:02,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aedd424a/4944c0006a354d0c9f08bd47fafd8a0a [2021-05-02 20:33:02,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:33:02,481 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:33:02,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:33:02,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:33:02,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:33:02,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:33:02" (1/1) ... [2021-05-02 20:33:02,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@317f18cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:02, skipping insertion in model container [2021-05-02 20:33:02,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:33:02" (1/1) ... [2021-05-02 20:33:02,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:33:02,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:33:02,580 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/egcd3-ll_unwindbound100.c[490,503] [2021-05-02 20:33:02,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:33:02,626 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:33:02,633 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/egcd3-ll_unwindbound100.c[490,503] [2021-05-02 20:33:02,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:33:02,663 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:33:02,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:02 WrapperNode [2021-05-02 20:33:02,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:33:02,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:33:02,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:33:02,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:33:02,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:02" (1/1) ... [2021-05-02 20:33:02,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:02" (1/1) ... [2021-05-02 20:33:02,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:02" (1/1) ... [2021-05-02 20:33:02,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:02" (1/1) ... [2021-05-02 20:33:02,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:02" (1/1) ... [2021-05-02 20:33:02,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:02" (1/1) ... [2021-05-02 20:33:02,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:02" (1/1) ... [2021-05-02 20:33:02,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:33:02,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:33:02,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:33:02,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:33:02,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:02" (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 20:33:02,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:33:02,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:33:02,777 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:33:02,777 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:33:02,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:33:02,777 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:33:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:33:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:33:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:33:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:33:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:33:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:33:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:33:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:33:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:33:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:33:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:33:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:33:02,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:33:02,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:33:03,068 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:33:03,069 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:33:03,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:03 BoogieIcfgContainer [2021-05-02 20:33:03,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:33:03,071 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:33:03,071 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:33:03,072 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:33:03,074 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:03" (1/1) ... [2021-05-02 20:33:03,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:33:03 BasicIcfg [2021-05-02 20:33:03,091 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:33:03,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:33:03,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:33:03,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:33:03,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:33:02" (1/4) ... [2021-05-02 20:33:03,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42fe2bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:33:03, skipping insertion in model container [2021-05-02 20:33:03,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:02" (2/4) ... [2021-05-02 20:33:03,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42fe2bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:33:03, skipping insertion in model container [2021-05-02 20:33:03,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:03" (3/4) ... [2021-05-02 20:33:03,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42fe2bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:33:03, skipping insertion in model container [2021-05-02 20:33:03,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:33:03" (4/4) ... [2021-05-02 20:33:03,100 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound100.cJordan [2021-05-02 20:33:03,105 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:33:03,108 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:33:03,119 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:33:03,134 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:33:03,134 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:33:03,134 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:33:03,135 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:33:03,135 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:33:03,135 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:33:03,135 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:33:03,135 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:33:03,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:33:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 20:33:03,160 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:03,161 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:03,161 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:03,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:03,168 INFO L82 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2021-05-02 20:33:03,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:03,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394955985] [2021-05-02 20:33:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:03,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:33:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:03,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:33:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:03,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:33:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:03,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:03,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394955985] [2021-05-02 20:33:03,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394955985] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:03,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:03,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:33:03,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862176760] [2021-05-02 20:33:03,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:33:03,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:03,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:33:03,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:33:03,338 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:03,462 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-05-02 20:33:03,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:33:03,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 20:33:03,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:03,468 INFO L225 Difference]: With dead ends: 41 [2021-05-02 20:33:03,468 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 20:33:03,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:33:03,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 20:33:03,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 20:33:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:33:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-02 20:33:03,492 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-02 20:33:03,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:03,492 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-02 20:33:03,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-02 20:33:03,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:33:03,494 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:03,494 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:03,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:33:03,494 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:03,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:03,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2021-05-02 20:33:03,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:03,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422328734] [2021-05-02 20:33:03,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:03,507 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:03,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206651606] [2021-05-02 20:33:03,507 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 20:33:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:03,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:33:03,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:03,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:03,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:03,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:03,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:03,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:03,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:03,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422328734] [2021-05-02 20:33:03,677 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:03,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206651606] [2021-05-02 20:33:03,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206651606] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:03,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:03,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:33:03,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196068486] [2021-05-02 20:33:03,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:33:03,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:03,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:33:03,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:33:03,686 INFO L87 Difference]: Start difference. First operand 35 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:03,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:03,700 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-02 20:33:03,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:33:03,701 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:33:03,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:03,701 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:33:03,701 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 20:33:03,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:33:03,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 20:33:03,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 20:33:03,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:33:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-02 20:33:03,706 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2021-05-02 20:33:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:03,707 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-02 20:33:03,707 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-02 20:33:03,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 20:33:03,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:03,708 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:03,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:33:03,913 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:03,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:03,914 INFO L82 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2021-05-02 20:33:03,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:03,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871218361] [2021-05-02 20:33:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:03,928 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:03,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739449521] [2021-05-02 20:33:03,928 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 20:33:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:04,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:33:04,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:04,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:33:04,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:04,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871218361] [2021-05-02 20:33:04,124 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:04,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739449521] [2021-05-02 20:33:04,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739449521] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:04,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:04,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:33:04,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064823928] [2021-05-02 20:33:04,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:33:04,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:04,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:33:04,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:04,126 INFO L87 Difference]: Start difference. First operand 37 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:33:04,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:04,223 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2021-05-02 20:33:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:04,224 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-02 20:33:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:04,225 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:33:04,225 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 20:33:04,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:04,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 20:33:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-02 20:33:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:33:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-02 20:33:04,230 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-05-02 20:33:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:04,230 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-02 20:33:04,231 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:33:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-02 20:33:04,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:33:04,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:04,231 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:04,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:04,432 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:04,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:04,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2021-05-02 20:33:04,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:04,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146696068] [2021-05-02 20:33:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:04,443 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:04,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210958855] [2021-05-02 20:33:04,444 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 20:33:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:04,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:33:04,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:04,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:04,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:04,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146696068] [2021-05-02 20:33:04,656 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:04,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210958855] [2021-05-02 20:33:04,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210958855] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:04,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:04,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:33:04,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327908152] [2021-05-02 20:33:04,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:33:04,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:04,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:33:04,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:33:04,658 INFO L87 Difference]: Start difference. First operand 38 states and 48 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:04,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:04,682 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-02 20:33:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:33:04,683 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 20:33:04,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:04,684 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:33:04,684 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 20:33:04,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:33:04,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 20:33:04,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 20:33:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:33:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-02 20:33:04,692 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2021-05-02 20:33:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:04,692 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-02 20:33:04,692 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:04,692 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-02 20:33:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:33:04,693 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:04,693 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:04,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:04,897 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2021-05-02 20:33:04,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:04,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979840247] [2021-05-02 20:33:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:04,914 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:04,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452261591] [2021-05-02 20:33:04,915 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 20:33:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:04,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:33:04,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:05,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:05,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:05,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979840247] [2021-05-02 20:33:05,110 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:05,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452261591] [2021-05-02 20:33:05,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452261591] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:05,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:05,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:33:05,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015142680] [2021-05-02 20:33:05,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:33:05,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:05,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:33:05,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:05,112 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:05,197 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2021-05-02 20:33:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:33:05,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 20:33:05,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:05,201 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:33:05,201 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 20:33:05,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:05,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 20:33:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 20:33:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:33:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2021-05-02 20:33:05,208 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2021-05-02 20:33:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:05,208 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2021-05-02 20:33:05,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:05,208 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2021-05-02 20:33:05,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 20:33:05,209 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:05,209 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:05,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:05,410 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:05,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:05,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2021-05-02 20:33:05,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:05,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707392275] [2021-05-02 20:33:05,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:05,419 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:05,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489677736] [2021-05-02 20:33:05,420 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 20:33:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:05,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:33:05,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:05,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:05,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:05,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707392275] [2021-05-02 20:33:05,555 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:05,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489677736] [2021-05-02 20:33:05,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489677736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:05,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:05,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:33:05,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899914429] [2021-05-02 20:33:05,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:33:05,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:05,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:33:05,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:05,556 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:05,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:05,588 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2021-05-02 20:33:05,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:33:05,593 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-05-02 20:33:05,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:05,595 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:33:05,595 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:33:05,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:33:05,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:33:05,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 20:33:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:33:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-05-02 20:33:05,603 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2021-05-02 20:33:05,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:05,603 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-05-02 20:33:05,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:05,604 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-05-02 20:33:05,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 20:33:05,604 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:05,604 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:05,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:33:05,813 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:05,813 INFO L82 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2021-05-02 20:33:05,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:05,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300680277] [2021-05-02 20:33:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:05,822 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:05,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913438328] [2021-05-02 20:33:05,822 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 20:33:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:05,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:33:05,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:05,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:33:05,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:05,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300680277] [2021-05-02 20:33:05,933 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:05,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913438328] [2021-05-02 20:33:05,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913438328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:05,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:05,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:33:05,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218672632] [2021-05-02 20:33:05,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:33:05,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:05,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:33:05,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:05,934 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:06,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:06,088 INFO L93 Difference]: Finished difference Result 131 states and 193 transitions. [2021-05-02 20:33:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:33:06,088 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-02 20:33:06,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:06,089 INFO L225 Difference]: With dead ends: 131 [2021-05-02 20:33:06,089 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 20:33:06,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:33:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 20:33:06,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2021-05-02 20:33:06,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:33:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2021-05-02 20:33:06,097 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2021-05-02 20:33:06,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:06,097 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2021-05-02 20:33:06,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:06,097 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2021-05-02 20:33:06,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:33:06,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:06,098 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:06,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:06,305 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:06,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:06,306 INFO L82 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2021-05-02 20:33:06,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:06,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347133600] [2021-05-02 20:33:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:06,315 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:06,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911559558] [2021-05-02 20:33:06,315 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 20:33:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:06,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:33:06,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:06,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:33:06,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:06,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347133600] [2021-05-02 20:33:06,463 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:06,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911559558] [2021-05-02 20:33:06,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911559558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:06,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:06,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:33:06,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984121190] [2021-05-02 20:33:06,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:33:06,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:06,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:33:06,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:06,465 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:33:06,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:06,537 INFO L93 Difference]: Finished difference Result 93 states and 126 transitions. [2021-05-02 20:33:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:33:06,538 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 20:33:06,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:06,539 INFO L225 Difference]: With dead ends: 93 [2021-05-02 20:33:06,539 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 20:33:06,539 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:06,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 20:33:06,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 20:33:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 70 states have internal predecessors, (93), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:33:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2021-05-02 20:33:06,544 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 34 [2021-05-02 20:33:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:06,544 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2021-05-02 20:33:06,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:33:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2021-05-02 20:33:06,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 20:33:06,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:06,545 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:06,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:06,761 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:06,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:06,761 INFO L82 PathProgramCache]: Analyzing trace with hash 541001134, now seen corresponding path program 1 times [2021-05-02 20:33:06,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:06,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132720767] [2021-05-02 20:33:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:06,770 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:06,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178157611] [2021-05-02 20:33:06,771 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 20:33:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:06,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:33:06,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:06,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:06,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:06,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132720767] [2021-05-02 20:33:06,882 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:06,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178157611] [2021-05-02 20:33:06,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178157611] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:06,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:06,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:33:06,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235125548] [2021-05-02 20:33:06,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:33:06,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:06,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:33:06,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:06,883 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:06,903 INFO L93 Difference]: Finished difference Result 94 states and 127 transitions. [2021-05-02 20:33:06,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:06,904 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-05-02 20:33:06,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:06,904 INFO L225 Difference]: With dead ends: 94 [2021-05-02 20:33:06,904 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 20:33:06,905 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:06,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 20:33:06,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-02 20:33:06,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 72 states have internal predecessors, (95), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:33:06,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2021-05-02 20:33:06,909 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 35 [2021-05-02 20:33:06,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:06,909 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2021-05-02 20:33:06,909 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:06,909 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2021-05-02 20:33:06,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:33:06,910 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:06,910 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:07,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:33:07,114 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:07,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:07,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1873858129, now seen corresponding path program 1 times [2021-05-02 20:33:07,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:07,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310969870] [2021-05-02 20:33:07,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:07,123 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:07,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768402449] [2021-05-02 20:33:07,123 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 20:33:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:07,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:33:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:07,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:07,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:07,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310969870] [2021-05-02 20:33:07,265 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:07,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768402449] [2021-05-02 20:33:07,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768402449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:07,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:07,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:33:07,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860042374] [2021-05-02 20:33:07,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:33:07,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:07,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:33:07,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:33:07,266 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:07,305 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2021-05-02 20:33:07,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:33:07,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 20:33:07,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:07,306 INFO L225 Difference]: With dead ends: 120 [2021-05-02 20:33:07,306 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 20:33:07,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 20:33:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-05-02 20:33:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:33:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2021-05-02 20:33:07,313 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 36 [2021-05-02 20:33:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:07,313 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2021-05-02 20:33:07,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2021-05-02 20:33:07,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:33:07,314 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:07,314 INFO L523 BasicCegarLoop]: trace histogram [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 20:33:07,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:07,521 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:07,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:07,521 INFO L82 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2021-05-02 20:33:07,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:07,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085382536] [2021-05-02 20:33:07,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:07,528 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:07,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979861780] [2021-05-02 20:33:07,529 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 20:33:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:07,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:33:07,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:07,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:33:07,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:07,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085382536] [2021-05-02 20:33:07,669 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:07,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979861780] [2021-05-02 20:33:07,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979861780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:07,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:07,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:33:07,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854889591] [2021-05-02 20:33:07,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:33:07,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:07,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:33:07,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:07,671 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:07,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:07,768 INFO L93 Difference]: Finished difference Result 152 states and 206 transitions. [2021-05-02 20:33:07,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:33:07,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 20:33:07,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:07,770 INFO L225 Difference]: With dead ends: 152 [2021-05-02 20:33:07,770 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 20:33:07,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:07,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 20:33:07,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-05-02 20:33:07,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 20:33:07,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2021-05-02 20:33:07,775 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2021-05-02 20:33:07,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:07,776 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2021-05-02 20:33:07,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:07,776 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2021-05-02 20:33:07,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:33:07,776 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:07,776 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-02 20:33:07,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:07,994 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:07,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:07,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1011444142, now seen corresponding path program 2 times [2021-05-02 20:33:07,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:07,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719960755] [2021-05-02 20:33:07,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:08,001 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:08,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492210168] [2021-05-02 20:33:08,002 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 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 20:33:08,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:08,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:08,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:33:08,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:08,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:08,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:08,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719960755] [2021-05-02 20:33:08,143 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:08,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492210168] [2021-05-02 20:33:08,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492210168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:08,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:08,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:33:08,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736583197] [2021-05-02 20:33:08,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:33:08,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:08,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:33:08,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:08,144 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:08,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:08,220 INFO L93 Difference]: Finished difference Result 182 states and 239 transitions. [2021-05-02 20:33:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:33:08,220 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-05-02 20:33:08,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:08,221 INFO L225 Difference]: With dead ends: 182 [2021-05-02 20:33:08,221 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 20:33:08,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:08,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 20:33:08,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2021-05-02 20:33:08,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.31496062992126) internal successors, (167), 129 states have internal predecessors, (167), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 20:33:08,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2021-05-02 20:33:08,226 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 37 [2021-05-02 20:33:08,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:08,226 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2021-05-02 20:33:08,227 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2021-05-02 20:33:08,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:33:08,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:08,227 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:08,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:33:08,445 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:08,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:08,445 INFO L82 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2021-05-02 20:33:08,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:08,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74208503] [2021-05-02 20:33:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:08,451 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:08,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362457477] [2021-05-02 20:33:08,452 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 20:33:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:08,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:33:08,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:08,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:33:08,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:08,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74208503] [2021-05-02 20:33:08,597 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:08,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362457477] [2021-05-02 20:33:08,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362457477] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:08,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:08,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:33:08,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963605736] [2021-05-02 20:33:08,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:33:08,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:08,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:33:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:08,598 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 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 20:33:08,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:08,698 INFO L93 Difference]: Finished difference Result 193 states and 254 transitions. [2021-05-02 20:33:08,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:33:08,698 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 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 39 [2021-05-02 20:33:08,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:08,700 INFO L225 Difference]: With dead ends: 193 [2021-05-02 20:33:08,700 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 20:33:08,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:08,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 20:33:08,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-02 20:33:08,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 141 states have internal predecessors, (181), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 20:33:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 253 transitions. [2021-05-02 20:33:08,706 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 253 transitions. Word has length 39 [2021-05-02 20:33:08,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:08,706 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 253 transitions. [2021-05-02 20:33:08,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 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 20:33:08,706 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 253 transitions. [2021-05-02 20:33:08,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:33:08,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:08,707 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:08,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:33:08,915 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:08,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2021-05-02 20:33:08,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:08,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68728188] [2021-05-02 20:33:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:08,936 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:08,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29124175] [2021-05-02 20:33:08,936 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 20:33:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:08,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:33:08,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:09,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:33:09,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:09,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68728188] [2021-05-02 20:33:09,108 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:09,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29124175] [2021-05-02 20:33:09,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29124175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:09,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:09,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:33:09,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366982295] [2021-05-02 20:33:09,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:33:09,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:09,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:33:09,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:09,109 INFO L87 Difference]: Start difference. First operand 192 states and 253 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:33:09,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:09,246 INFO L93 Difference]: Finished difference Result 198 states and 258 transitions. [2021-05-02 20:33:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:33:09,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-05-02 20:33:09,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:09,249 INFO L225 Difference]: With dead ends: 198 [2021-05-02 20:33:09,249 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 20:33:09,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:09,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 20:33:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2021-05-02 20:33:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 142 states have (on average 1.295774647887324) internal successors, (184), 144 states have internal predecessors, (184), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 20:33:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 256 transitions. [2021-05-02 20:33:09,258 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 256 transitions. Word has length 41 [2021-05-02 20:33:09,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:09,259 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 256 transitions. [2021-05-02 20:33:09,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:33:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 256 transitions. [2021-05-02 20:33:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 20:33:09,259 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:09,259 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:09,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:33:09,475 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:09,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:09,475 INFO L82 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2021-05-02 20:33:09,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:09,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365375253] [2021-05-02 20:33:09,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:09,481 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:09,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150848093] [2021-05-02 20:33:09,481 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 20:33:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:09,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:33:09,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:09,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 20:33:09,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:09,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365375253] [2021-05-02 20:33:09,603 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:09,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150848093] [2021-05-02 20:33:09,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150848093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:09,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:09,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:33:09,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212905419] [2021-05-02 20:33:09,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:33:09,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:09,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:33:09,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:33:09,604 INFO L87 Difference]: Start difference. First operand 196 states and 256 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:33:09,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:09,661 INFO L93 Difference]: Finished difference Result 258 states and 356 transitions. [2021-05-02 20:33:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:33:09,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-05-02 20:33:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:09,662 INFO L225 Difference]: With dead ends: 258 [2021-05-02 20:33:09,662 INFO L226 Difference]: Without dead ends: 258 [2021-05-02 20:33:09,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-02 20:33:09,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 230. [2021-05-02 20:33:09,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 155 states have (on average 1.2967741935483872) internal successors, (201), 162 states have internal predecessors, (201), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 20:33:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 313 transitions. [2021-05-02 20:33:09,669 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 313 transitions. Word has length 44 [2021-05-02 20:33:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:09,670 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 313 transitions. [2021-05-02 20:33:09,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:33:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 313 transitions. [2021-05-02 20:33:09,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:33:09,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:09,670 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:09,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:09,885 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:09,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:09,885 INFO L82 PathProgramCache]: Analyzing trace with hash -982799261, now seen corresponding path program 1 times [2021-05-02 20:33:09,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:09,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138186119] [2021-05-02 20:33:09,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:09,890 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:09,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558523189] [2021-05-02 20:33:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:09,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:33:09,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:09,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:10,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:10,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138186119] [2021-05-02 20:33:10,012 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:10,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558523189] [2021-05-02 20:33:10,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558523189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:10,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:10,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:33:10,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338218641] [2021-05-02 20:33:10,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:33:10,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:10,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:33:10,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:10,013 INFO L87 Difference]: Start difference. First operand 230 states and 313 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:10,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:10,071 INFO L93 Difference]: Finished difference Result 241 states and 323 transitions. [2021-05-02 20:33:10,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:33:10,071 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-05-02 20:33:10,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:10,073 INFO L225 Difference]: With dead ends: 241 [2021-05-02 20:33:10,073 INFO L226 Difference]: Without dead ends: 241 [2021-05-02 20:33:10,073 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:10,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-02 20:33:10,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2021-05-02 20:33:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 162 states have (on average 1.2839506172839505) internal successors, (208), 168 states have internal predecessors, (208), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 20:33:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 320 transitions. [2021-05-02 20:33:10,079 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 320 transitions. Word has length 42 [2021-05-02 20:33:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:10,080 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 320 transitions. [2021-05-02 20:33:10,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:10,080 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 320 transitions. [2021-05-02 20:33:10,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:33:10,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:10,080 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:10,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:33:10,292 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:10,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:10,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1867030118, now seen corresponding path program 2 times [2021-05-02 20:33:10,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:10,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788376743] [2021-05-02 20:33:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:10,298 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:10,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644739392] [2021-05-02 20:33:10,298 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 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 20:33:10,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:10,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:10,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:33:10,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:10,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 20:33:10,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:10,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788376743] [2021-05-02 20:33:10,421 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:10,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644739392] [2021-05-02 20:33:10,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644739392] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:10,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:10,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:33:10,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884340776] [2021-05-02 20:33:10,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:33:10,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:10,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:33:10,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:33:10,424 INFO L87 Difference]: Start difference. First operand 237 states and 320 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:33:10,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:10,479 INFO L93 Difference]: Finished difference Result 375 states and 550 transitions. [2021-05-02 20:33:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:10,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-05-02 20:33:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:10,481 INFO L225 Difference]: With dead ends: 375 [2021-05-02 20:33:10,482 INFO L226 Difference]: Without dead ends: 375 [2021-05-02 20:33:10,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:33:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-02 20:33:10,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 261. [2021-05-02 20:33:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 186 states have (on average 1.3010752688172043) internal successors, (242), 192 states have internal predecessors, (242), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 20:33:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 354 transitions. [2021-05-02 20:33:10,495 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 354 transitions. Word has length 43 [2021-05-02 20:33:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:10,495 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 354 transitions. [2021-05-02 20:33:10,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:33:10,496 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 354 transitions. [2021-05-02 20:33:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:33:10,496 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:10,496 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-05-02 20:33:10,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:33:10,712 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:10,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:10,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1204922772, now seen corresponding path program 1 times [2021-05-02 20:33:10,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:10,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679275817] [2021-05-02 20:33:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:10,718 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:10,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474058254] [2021-05-02 20:33:10,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:10,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:33:10,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:10,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 20:33:10,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:10,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679275817] [2021-05-02 20:33:10,908 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:10,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474058254] [2021-05-02 20:33:10,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474058254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:10,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:10,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:33:10,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090088739] [2021-05-02 20:33:10,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:33:10,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:10,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:33:10,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:10,909 INFO L87 Difference]: Start difference. First operand 261 states and 354 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:33:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:11,113 INFO L93 Difference]: Finished difference Result 335 states and 474 transitions. [2021-05-02 20:33:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:33:11,113 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-05-02 20:33:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:11,115 INFO L225 Difference]: With dead ends: 335 [2021-05-02 20:33:11,115 INFO L226 Difference]: Without dead ends: 335 [2021-05-02 20:33:11,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:33:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-05-02 20:33:11,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 292. [2021-05-02 20:33:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 200 states have (on average 1.315) internal successors, (263), 208 states have internal predecessors, (263), 73 states have call successors, (73), 19 states have call predecessors, (73), 18 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 20:33:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 407 transitions. [2021-05-02 20:33:11,122 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 407 transitions. Word has length 46 [2021-05-02 20:33:11,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:11,123 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 407 transitions. [2021-05-02 20:33:11,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:33:11,123 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 407 transitions. [2021-05-02 20:33:11,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 20:33:11,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:11,123 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:11,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:33:11,337 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:11,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2021-05-02 20:33:11,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:11,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461874028] [2021-05-02 20:33:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:11,343 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:11,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61659612] [2021-05-02 20:33:11,343 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 20:33:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:11,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 20:33:11,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:11,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:33:11,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:11,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461874028] [2021-05-02 20:33:11,750 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:11,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61659612] [2021-05-02 20:33:11,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61659612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:11,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:11,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:33:11,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403308333] [2021-05-02 20:33:11,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:33:11,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:11,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:33:11,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:33:11,751 INFO L87 Difference]: Start difference. First operand 292 states and 407 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:12,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:12,232 INFO L93 Difference]: Finished difference Result 323 states and 450 transitions. [2021-05-02 20:33:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:33:12,233 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2021-05-02 20:33:12,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:12,235 INFO L225 Difference]: With dead ends: 323 [2021-05-02 20:33:12,235 INFO L226 Difference]: Without dead ends: 322 [2021-05-02 20:33:12,235 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 353.1ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:33:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-02 20:33:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2021-05-02 20:33:12,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 217 states have (on average 1.3133640552995391) internal successors, (285), 226 states have internal predecessors, (285), 81 states have call successors, (81), 21 states have call predecessors, (81), 20 states have return successors, (79), 71 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 20:33:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 445 transitions. [2021-05-02 20:33:12,245 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 445 transitions. Word has length 58 [2021-05-02 20:33:12,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:12,245 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 445 transitions. [2021-05-02 20:33:12,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:12,245 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 445 transitions. [2021-05-02 20:33:12,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 20:33:12,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:12,246 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:12,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:12,461 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:12,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:12,461 INFO L82 PathProgramCache]: Analyzing trace with hash -80402644, now seen corresponding path program 1 times [2021-05-02 20:33:12,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:12,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446177159] [2021-05-02 20:33:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:12,468 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:12,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442854884] [2021-05-02 20:33:12,468 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 20:33:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:12,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:33:12,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:12,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:33:12,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:12,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446177159] [2021-05-02 20:33:12,638 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:12,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442854884] [2021-05-02 20:33:12,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442854884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:12,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:12,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:33:12,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921206629] [2021-05-02 20:33:12,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:33:12,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:12,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:33:12,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:12,639 INFO L87 Difference]: Start difference. First operand 319 states and 445 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:12,725 INFO L93 Difference]: Finished difference Result 376 states and 499 transitions. [2021-05-02 20:33:12,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:33:12,726 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2021-05-02 20:33:12,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:12,733 INFO L225 Difference]: With dead ends: 376 [2021-05-02 20:33:12,733 INFO L226 Difference]: Without dead ends: 376 [2021-05-02 20:33:12,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-02 20:33:12,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 363. [2021-05-02 20:33:12,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 249 states have (on average 1.2811244979919678) internal successors, (319), 257 states have internal predecessors, (319), 85 states have call successors, (85), 29 states have call predecessors, (85), 28 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-02 20:33:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 487 transitions. [2021-05-02 20:33:12,742 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 487 transitions. Word has length 63 [2021-05-02 20:33:12,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:12,743 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 487 transitions. [2021-05-02 20:33:12,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:12,744 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 487 transitions. [2021-05-02 20:33:12,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 20:33:12,744 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:12,744 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:12,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:12,959 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:12,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2021-05-02 20:33:12,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:12,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068617707] [2021-05-02 20:33:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:12,965 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:12,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978323964] [2021-05-02 20:33:12,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:13,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:33:13,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:13,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:33:13,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:13,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068617707] [2021-05-02 20:33:13,118 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:13,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978323964] [2021-05-02 20:33:13,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978323964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:13,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:13,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:33:13,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107486732] [2021-05-02 20:33:13,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:33:13,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:13,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:33:13,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:13,119 INFO L87 Difference]: Start difference. First operand 363 states and 487 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:13,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:13,232 INFO L93 Difference]: Finished difference Result 450 states and 586 transitions. [2021-05-02 20:33:13,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:33:13,233 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2021-05-02 20:33:13,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:13,234 INFO L225 Difference]: With dead ends: 450 [2021-05-02 20:33:13,234 INFO L226 Difference]: Without dead ends: 450 [2021-05-02 20:33:13,234 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:33:13,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-02 20:33:13,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 430. [2021-05-02 20:33:13,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 295 states have (on average 1.264406779661017) internal successors, (373), 307 states have internal predecessors, (373), 98 states have call successors, (98), 37 states have call predecessors, (98), 36 states have return successors, (95), 85 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-02 20:33:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 566 transitions. [2021-05-02 20:33:13,243 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 566 transitions. Word has length 64 [2021-05-02 20:33:13,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:13,244 INFO L480 AbstractCegarLoop]: Abstraction has 430 states and 566 transitions. [2021-05-02 20:33:13,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 566 transitions. [2021-05-02 20:33:13,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 20:33:13,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:13,245 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2021-05-02 20:33:13,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 20:33:13,465 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:13,465 INFO L82 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2021-05-02 20:33:13,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:13,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558047572] [2021-05-02 20:33:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:13,474 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:13,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901929086] [2021-05-02 20:33:13,474 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 20:33:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:13,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 20:33:13,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:13,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-02 20:33:13,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:13,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558047572] [2021-05-02 20:33:13,650 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:13,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901929086] [2021-05-02 20:33:13,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901929086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:13,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:13,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:33:13,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599943163] [2021-05-02 20:33:13,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:33:13,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:13,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:33:13,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:13,651 INFO L87 Difference]: Start difference. First operand 430 states and 566 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:33:13,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:13,804 INFO L93 Difference]: Finished difference Result 458 states and 602 transitions. [2021-05-02 20:33:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:33:13,805 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2021-05-02 20:33:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:13,806 INFO L225 Difference]: With dead ends: 458 [2021-05-02 20:33:13,806 INFO L226 Difference]: Without dead ends: 458 [2021-05-02 20:33:13,807 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:33:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-02 20:33:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 440. [2021-05-02 20:33:13,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 301 states have (on average 1.2624584717607974) internal successors, (380), 313 states have internal predecessors, (380), 101 states have call successors, (101), 38 states have call predecessors, (101), 37 states have return successors, (98), 88 states have call predecessors, (98), 98 states have call successors, (98) [2021-05-02 20:33:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 579 transitions. [2021-05-02 20:33:13,817 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 579 transitions. Word has length 67 [2021-05-02 20:33:13,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:13,817 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 579 transitions. [2021-05-02 20:33:13,818 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:33:13,818 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 579 transitions. [2021-05-02 20:33:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 20:33:13,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:13,818 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:14,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 20:33:14,034 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:14,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:14,035 INFO L82 PathProgramCache]: Analyzing trace with hash -28038179, now seen corresponding path program 2 times [2021-05-02 20:33:14,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:14,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900494796] [2021-05-02 20:33:14,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:14,039 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:14,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929231417] [2021-05-02 20:33:14,040 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 20:33:14,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:14,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:14,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:33:14,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:14,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:33:14,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:14,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900494796] [2021-05-02 20:33:14,197 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:14,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929231417] [2021-05-02 20:33:14,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929231417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:14,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:14,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:33:14,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380705939] [2021-05-02 20:33:14,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:33:14,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:14,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:33:14,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:14,198 INFO L87 Difference]: Start difference. First operand 440 states and 579 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:33:14,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:14,532 INFO L93 Difference]: Finished difference Result 776 states and 1140 transitions. [2021-05-02 20:33:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:33:14,532 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-05-02 20:33:14,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:14,535 INFO L225 Difference]: With dead ends: 776 [2021-05-02 20:33:14,535 INFO L226 Difference]: Without dead ends: 776 [2021-05-02 20:33:14,535 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:33:14,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-05-02 20:33:14,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 502. [2021-05-02 20:33:14,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 347 states have (on average 1.2881844380403458) internal successors, (447), 359 states have internal predecessors, (447), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 104 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 20:33:14,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 678 transitions. [2021-05-02 20:33:14,550 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 678 transitions. Word has length 65 [2021-05-02 20:33:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:14,550 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 678 transitions. [2021-05-02 20:33:14,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:33:14,550 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 678 transitions. [2021-05-02 20:33:14,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 20:33:14,551 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:14,551 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:14,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:14,765 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:14,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:14,765 INFO L82 PathProgramCache]: Analyzing trace with hash 695478703, now seen corresponding path program 1 times [2021-05-02 20:33:14,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:14,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793522317] [2021-05-02 20:33:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:14,770 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:14,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511033034] [2021-05-02 20:33:14,770 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 20:33:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:14,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:33:14,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:14,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:33:14,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:14,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793522317] [2021-05-02 20:33:14,940 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:14,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511033034] [2021-05-02 20:33:14,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511033034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:14,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:14,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:33:14,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134688607] [2021-05-02 20:33:14,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:33:14,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:14,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:33:14,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:14,941 INFO L87 Difference]: Start difference. First operand 502 states and 678 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:15,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:15,025 INFO L93 Difference]: Finished difference Result 504 states and 676 transitions. [2021-05-02 20:33:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:33:15,025 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-05-02 20:33:15,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:15,026 INFO L225 Difference]: With dead ends: 504 [2021-05-02 20:33:15,027 INFO L226 Difference]: Without dead ends: 504 [2021-05-02 20:33:15,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:15,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-05-02 20:33:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 502. [2021-05-02 20:33:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 347 states have (on average 1.2795389048991355) internal successors, (444), 359 states have internal predecessors, (444), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 104 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 20:33:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 675 transitions. [2021-05-02 20:33:15,037 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 675 transitions. Word has length 65 [2021-05-02 20:33:15,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:15,037 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 675 transitions. [2021-05-02 20:33:15,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:15,038 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 675 transitions. [2021-05-02 20:33:15,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:33:15,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:15,038 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:15,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 20:33:15,249 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:15,249 INFO L82 PathProgramCache]: Analyzing trace with hash -609169376, now seen corresponding path program 1 times [2021-05-02 20:33:15,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:15,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556864642] [2021-05-02 20:33:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:15,254 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:15,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827773711] [2021-05-02 20:33:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:15,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 20:33:15,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:15,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 20:33:15,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:15,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556864642] [2021-05-02 20:33:15,392 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:15,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827773711] [2021-05-02 20:33:15,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827773711] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:15,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:15,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:33:15,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237007140] [2021-05-02 20:33:15,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:33:15,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:15,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:33:15,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:33:15,394 INFO L87 Difference]: Start difference. First operand 502 states and 675 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:33:15,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:15,435 INFO L93 Difference]: Finished difference Result 584 states and 784 transitions. [2021-05-02 20:33:15,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:15,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2021-05-02 20:33:15,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:15,441 INFO L225 Difference]: With dead ends: 584 [2021-05-02 20:33:15,441 INFO L226 Difference]: Without dead ends: 584 [2021-05-02 20:33:15,441 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:15,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-05-02 20:33:15,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 528. [2021-05-02 20:33:15,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 373 states have (on average 1.2868632707774799) internal successors, (480), 379 states have internal predecessors, (480), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 110 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 20:33:15,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 711 transitions. [2021-05-02 20:33:15,452 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 711 transitions. Word has length 69 [2021-05-02 20:33:15,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:15,452 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 711 transitions. [2021-05-02 20:33:15,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:33:15,452 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 711 transitions. [2021-05-02 20:33:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:33:15,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:15,453 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:15,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:15,669 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:15,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:15,669 INFO L82 PathProgramCache]: Analyzing trace with hash -893000644, now seen corresponding path program 2 times [2021-05-02 20:33:15,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:15,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432343287] [2021-05-02 20:33:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:15,679 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:15,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421343529] [2021-05-02 20:33:15,679 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 20:33:15,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:15,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:15,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:33:15,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:15,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:33:15,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:15,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432343287] [2021-05-02 20:33:15,868 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:15,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421343529] [2021-05-02 20:33:15,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421343529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:15,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:15,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:33:15,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17132238] [2021-05-02 20:33:15,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:33:15,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:15,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:33:15,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:15,871 INFO L87 Difference]: Start difference. First operand 528 states and 711 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:16,002 INFO L93 Difference]: Finished difference Result 551 states and 732 transitions. [2021-05-02 20:33:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:33:16,003 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2021-05-02 20:33:16,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:16,005 INFO L225 Difference]: With dead ends: 551 [2021-05-02 20:33:16,005 INFO L226 Difference]: Without dead ends: 551 [2021-05-02 20:33:16,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:33:16,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-05-02 20:33:16,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 540. [2021-05-02 20:33:16,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 383 states have (on average 1.279373368146214) internal successors, (490), 386 states have internal predecessors, (490), 118 states have call successors, (118), 39 states have call predecessors, (118), 38 states have return successors, (115), 114 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-02 20:33:16,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 723 transitions. [2021-05-02 20:33:16,015 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 723 transitions. Word has length 69 [2021-05-02 20:33:16,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:16,015 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 723 transitions. [2021-05-02 20:33:16,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:16,015 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 723 transitions. [2021-05-02 20:33:16,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 20:33:16,016 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:16,016 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:16,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 20:33:16,232 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:16,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1125561725, now seen corresponding path program 2 times [2021-05-02 20:33:16,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:16,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705458180] [2021-05-02 20:33:16,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:16,238 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:16,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364665088] [2021-05-02 20:33:16,238 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 20:33:16,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:16,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:16,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:33:16,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:16,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:33:16,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:16,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705458180] [2021-05-02 20:33:16,424 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:16,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364665088] [2021-05-02 20:33:16,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364665088] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:16,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:16,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:33:16,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238539586] [2021-05-02 20:33:16,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:33:16,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:16,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:33:16,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:16,425 INFO L87 Difference]: Start difference. First operand 540 states and 723 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:16,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:16,586 INFO L93 Difference]: Finished difference Result 660 states and 852 transitions. [2021-05-02 20:33:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:33:16,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2021-05-02 20:33:16,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:16,588 INFO L225 Difference]: With dead ends: 660 [2021-05-02 20:33:16,588 INFO L226 Difference]: Without dead ends: 660 [2021-05-02 20:33:16,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:33:16,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-05-02 20:33:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 627. [2021-05-02 20:33:16,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 441 states have (on average 1.256235827664399) internal successors, (554), 445 states have internal predecessors, (554), 135 states have call successors, (135), 51 states have call predecessors, (135), 50 states have return successors, (131), 130 states have call predecessors, (131), 131 states have call successors, (131) [2021-05-02 20:33:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 820 transitions. [2021-05-02 20:33:16,600 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 820 transitions. Word has length 70 [2021-05-02 20:33:16,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:16,601 INFO L480 AbstractCegarLoop]: Abstraction has 627 states and 820 transitions. [2021-05-02 20:33:16,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:16,601 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 820 transitions. [2021-05-02 20:33:16,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 20:33:16,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:16,602 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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 20:33:16,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 20:33:16,817 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:16,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:16,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1343179262, now seen corresponding path program 1 times [2021-05-02 20:33:16,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:16,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596491312] [2021-05-02 20:33:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:16,824 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:16,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1387982043] [2021-05-02 20:33:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:16,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:33:16,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:16,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:16,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:17,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:17,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:17,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:17,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:17,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:17,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:17,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:17,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:17,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:17,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:17,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:33:17,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:17,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596491312] [2021-05-02 20:33:17,302 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:17,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387982043] [2021-05-02 20:33:17,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387982043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:17,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:17,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:33:17,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863036907] [2021-05-02 20:33:17,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:33:17,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:17,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:33:17,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:33:17,303 INFO L87 Difference]: Start difference. First operand 627 states and 820 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:33:18,720 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-02 20:33:18,999 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-05-02 20:33:19,222 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-02 20:33:19,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:19,699 INFO L93 Difference]: Finished difference Result 798 states and 1077 transitions. [2021-05-02 20:33:19,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 20:33:19,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 70 [2021-05-02 20:33:19,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:19,702 INFO L225 Difference]: With dead ends: 798 [2021-05-02 20:33:19,702 INFO L226 Difference]: Without dead ends: 798 [2021-05-02 20:33:19,703 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1741.4ms TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 20:33:19,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-05-02 20:33:19,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 749. [2021-05-02 20:33:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 530 states have (on average 1.288679245283019) internal successors, (683), 534 states have internal predecessors, (683), 167 states have call successors, (167), 52 states have call predecessors, (167), 51 states have return successors, (163), 162 states have call predecessors, (163), 163 states have call successors, (163) [2021-05-02 20:33:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1013 transitions. [2021-05-02 20:33:19,716 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1013 transitions. Word has length 70 [2021-05-02 20:33:19,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:19,717 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 1013 transitions. [2021-05-02 20:33:19,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:33:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1013 transitions. [2021-05-02 20:33:19,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:33:19,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:19,717 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 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] [2021-05-02 20:33:19,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 20:33:19,925 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:19,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:19,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1695740300, now seen corresponding path program 1 times [2021-05-02 20:33:19,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:19,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084609203] [2021-05-02 20:33:19,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:19,930 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:19,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749325888] [2021-05-02 20:33:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:19,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:33:19,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:20,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-02 20:33:20,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:20,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084609203] [2021-05-02 20:33:20,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:20,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749325888] [2021-05-02 20:33:20,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749325888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:20,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:20,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:33:20,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982099716] [2021-05-02 20:33:20,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:33:20,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:20,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:33:20,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:20,165 INFO L87 Difference]: Start difference. First operand 749 states and 1013 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:33:20,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:20,570 INFO L93 Difference]: Finished difference Result 1022 states and 1446 transitions. [2021-05-02 20:33:20,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:33:20,570 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 74 [2021-05-02 20:33:20,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:20,573 INFO L225 Difference]: With dead ends: 1022 [2021-05-02 20:33:20,573 INFO L226 Difference]: Without dead ends: 1022 [2021-05-02 20:33:20,574 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-05-02 20:33:20,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-05-02 20:33:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 779. [2021-05-02 20:33:20,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 545 states have (on average 1.2862385321100918) internal successors, (701), 552 states have internal predecessors, (701), 179 states have call successors, (179), 55 states have call predecessors, (179), 54 states have return successors, (175), 171 states have call predecessors, (175), 175 states have call successors, (175) [2021-05-02 20:33:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1055 transitions. [2021-05-02 20:33:20,589 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1055 transitions. Word has length 74 [2021-05-02 20:33:20,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:20,589 INFO L480 AbstractCegarLoop]: Abstraction has 779 states and 1055 transitions. [2021-05-02 20:33:20,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:33:20,589 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1055 transitions. [2021-05-02 20:33:20,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:33:20,590 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:20,590 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 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, 1] [2021-05-02 20:33:20,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 20:33:20,805 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:20,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:20,805 INFO L82 PathProgramCache]: Analyzing trace with hash 589974765, now seen corresponding path program 2 times [2021-05-02 20:33:20,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:20,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282926581] [2021-05-02 20:33:20,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:20,811 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:20,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602812286] [2021-05-02 20:33:20,811 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 20:33:20,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:20,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:20,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:33:20,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:20,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 20:33:21,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:21,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282926581] [2021-05-02 20:33:21,025 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:21,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602812286] [2021-05-02 20:33:21,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602812286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:21,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:21,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:33:21,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520199904] [2021-05-02 20:33:21,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:33:21,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:21,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:33:21,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:21,026 INFO L87 Difference]: Start difference. First operand 779 states and 1055 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 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 20:33:21,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:21,307 INFO L93 Difference]: Finished difference Result 976 states and 1361 transitions. [2021-05-02 20:33:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:33:21,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 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 73 [2021-05-02 20:33:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:21,310 INFO L225 Difference]: With dead ends: 976 [2021-05-02 20:33:21,310 INFO L226 Difference]: Without dead ends: 976 [2021-05-02 20:33:21,310 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-05-02 20:33:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-05-02 20:33:21,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 897. [2021-05-02 20:33:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 621 states have (on average 1.317230273752013) internal successors, (818), 628 states have internal predecessors, (818), 219 states have call successors, (219), 57 states have call predecessors, (219), 56 states have return successors, (215), 211 states have call predecessors, (215), 215 states have call successors, (215) [2021-05-02 20:33:21,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1252 transitions. [2021-05-02 20:33:21,326 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1252 transitions. Word has length 73 [2021-05-02 20:33:21,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:21,326 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 1252 transitions. [2021-05-02 20:33:21,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 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 20:33:21,326 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1252 transitions. [2021-05-02 20:33:21,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:33:21,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:21,327 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 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 20:33:21,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:21,541 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:21,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:21,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 3 times [2021-05-02 20:33:21,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:21,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524759377] [2021-05-02 20:33:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:21,545 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:21,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554826146] [2021-05-02 20:33:21,545 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 20:33:21,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:33:21,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:21,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 20:33:21,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:21,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:22,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:22,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 36 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 20:33:22,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:22,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524759377] [2021-05-02 20:33:22,057 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:22,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554826146] [2021-05-02 20:33:22,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554826146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:22,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:22,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 20:33:22,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506000354] [2021-05-02 20:33:22,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 20:33:22,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:22,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 20:33:22,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:33:22,058 INFO L87 Difference]: Start difference. First operand 897 states and 1252 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:33:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:22,710 INFO L93 Difference]: Finished difference Result 977 states and 1362 transitions. [2021-05-02 20:33:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:33:22,711 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 75 [2021-05-02 20:33:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:22,713 INFO L225 Difference]: With dead ends: 977 [2021-05-02 20:33:22,713 INFO L226 Difference]: Without dead ends: 977 [2021-05-02 20:33:22,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-05-02 20:33:22,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-05-02 20:33:22,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 957. [2021-05-02 20:33:22,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 660 states have (on average 1.3212121212121213) internal successors, (872), 668 states have internal predecessors, (872), 236 states have call successors, (236), 61 states have call predecessors, (236), 60 states have return successors, (232), 227 states have call predecessors, (232), 232 states have call successors, (232) [2021-05-02 20:33:22,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1340 transitions. [2021-05-02 20:33:22,728 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1340 transitions. Word has length 75 [2021-05-02 20:33:22,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:22,728 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 1340 transitions. [2021-05-02 20:33:22,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:33:22,728 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1340 transitions. [2021-05-02 20:33:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 20:33:22,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:22,729 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:22,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:22,944 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:22,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:22,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1753783729, now seen corresponding path program 3 times [2021-05-02 20:33:22,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:22,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140313001] [2021-05-02 20:33:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:22,949 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:22,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453293545] [2021-05-02 20:33:22,950 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 20:33:22,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:33:22,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:22,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:33:23,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:23,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:33:23,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:23,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140313001] [2021-05-02 20:33:23,151 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:23,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453293545] [2021-05-02 20:33:23,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453293545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:23,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:23,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:33:23,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015619482] [2021-05-02 20:33:23,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:33:23,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:23,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:33:23,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:23,152 INFO L87 Difference]: Start difference. First operand 957 states and 1340 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:23,351 INFO L93 Difference]: Finished difference Result 1138 states and 1543 transitions. [2021-05-02 20:33:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:33:23,351 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2021-05-02 20:33:23,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:23,354 INFO L225 Difference]: With dead ends: 1138 [2021-05-02 20:33:23,354 INFO L226 Difference]: Without dead ends: 1138 [2021-05-02 20:33:23,355 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:33:23,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-05-02 20:33:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1108. [2021-05-02 20:33:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 764 states have (on average 1.2905759162303665) internal successors, (986), 773 states have internal predecessors, (986), 268 states have call successors, (268), 76 states have call predecessors, (268), 75 states have return successors, (263), 258 states have call predecessors, (263), 263 states have call successors, (263) [2021-05-02 20:33:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1517 transitions. [2021-05-02 20:33:23,375 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1517 transitions. Word has length 76 [2021-05-02 20:33:23,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:23,375 INFO L480 AbstractCegarLoop]: Abstraction has 1108 states and 1517 transitions. [2021-05-02 20:33:23,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1517 transitions. [2021-05-02 20:33:23,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 20:33:23,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:23,376 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:23,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:23,589 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:23,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:23,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1747863324, now seen corresponding path program 1 times [2021-05-02 20:33:23,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:23,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743754275] [2021-05-02 20:33:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:23,593 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:23,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371685633] [2021-05-02 20:33:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:23,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 20:33:23,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:23,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 20:33:24,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:24,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743754275] [2021-05-02 20:33:24,027 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:24,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371685633] [2021-05-02 20:33:24,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371685633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:24,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:24,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:33:24,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885323301] [2021-05-02 20:33:24,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:33:24,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:24,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:33:24,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:33:24,028 INFO L87 Difference]: Start difference. First operand 1108 states and 1517 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:24,669 INFO L93 Difference]: Finished difference Result 1178 states and 1611 transitions. [2021-05-02 20:33:24,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:33:24,670 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 81 [2021-05-02 20:33:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:24,673 INFO L225 Difference]: With dead ends: 1178 [2021-05-02 20:33:24,673 INFO L226 Difference]: Without dead ends: 1177 [2021-05-02 20:33:24,675 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 382.0ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-02 20:33:24,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-05-02 20:33:24,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1162. [2021-05-02 20:33:24,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 798 states have (on average 1.2907268170426065) internal successors, (1030), 805 states have internal predecessors, (1030), 283 states have call successors, (283), 81 states have call predecessors, (283), 80 states have return successors, (279), 275 states have call predecessors, (279), 279 states have call successors, (279) [2021-05-02 20:33:24,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1592 transitions. [2021-05-02 20:33:24,694 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1592 transitions. Word has length 81 [2021-05-02 20:33:24,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:24,694 INFO L480 AbstractCegarLoop]: Abstraction has 1162 states and 1592 transitions. [2021-05-02 20:33:24,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:24,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1592 transitions. [2021-05-02 20:33:24,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:33:24,695 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:24,695 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 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 20:33:24,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 20:33:24,909 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:24,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:24,909 INFO L82 PathProgramCache]: Analyzing trace with hash 572886209, now seen corresponding path program 1 times [2021-05-02 20:33:24,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:24,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13236106] [2021-05-02 20:33:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:24,913 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:24,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659775866] [2021-05-02 20:33:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:24,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:33:24,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:24,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:33:25,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:25,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13236106] [2021-05-02 20:33:25,135 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:25,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659775866] [2021-05-02 20:33:25,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659775866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:25,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:25,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:33:25,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106732281] [2021-05-02 20:33:25,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:33:25,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:25,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:33:25,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:25,136 INFO L87 Difference]: Start difference. First operand 1162 states and 1592 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:25,274 INFO L93 Difference]: Finished difference Result 1168 states and 1593 transitions. [2021-05-02 20:33:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:33:25,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-02 20:33:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:25,277 INFO L225 Difference]: With dead ends: 1168 [2021-05-02 20:33:25,277 INFO L226 Difference]: Without dead ends: 1168 [2021-05-02 20:33:25,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:33:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-05-02 20:33:25,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1162. [2021-05-02 20:33:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 798 states have (on average 1.2882205513784462) internal successors, (1028), 805 states have internal predecessors, (1028), 283 states have call successors, (283), 81 states have call predecessors, (283), 80 states have return successors, (279), 275 states have call predecessors, (279), 279 states have call successors, (279) [2021-05-02 20:33:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1590 transitions. [2021-05-02 20:33:25,293 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1590 transitions. Word has length 87 [2021-05-02 20:33:25,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:25,293 INFO L480 AbstractCegarLoop]: Abstraction has 1162 states and 1590 transitions. [2021-05-02 20:33:25,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:25,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1590 transitions. [2021-05-02 20:33:25,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 20:33:25,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:25,294 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:33:25,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:25,509 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:25,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:25,510 INFO L82 PathProgramCache]: Analyzing trace with hash -2091636203, now seen corresponding path program 2 times [2021-05-02 20:33:25,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:25,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918464208] [2021-05-02 20:33:25,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:25,514 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:25,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364048184] [2021-05-02 20:33:25,514 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 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 [2021-05-02 20:33:25,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:25,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:25,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:33:25,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:25,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-02 20:33:25,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:25,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918464208] [2021-05-02 20:33:25,745 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:25,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364048184] [2021-05-02 20:33:25,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364048184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:25,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:25,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:33:25,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276437029] [2021-05-02 20:33:25,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:33:25,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:25,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:33:25,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:25,746 INFO L87 Difference]: Start difference. First operand 1162 states and 1590 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:33:25,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:25,980 INFO L93 Difference]: Finished difference Result 1201 states and 1640 transitions. [2021-05-02 20:33:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:33:25,981 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 90 [2021-05-02 20:33:25,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:25,984 INFO L225 Difference]: With dead ends: 1201 [2021-05-02 20:33:25,984 INFO L226 Difference]: Without dead ends: 1201 [2021-05-02 20:33:25,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:33:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-05-02 20:33:25,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1177. [2021-05-02 20:33:25,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 807 states have (on average 1.2862453531598512) internal successors, (1038), 814 states have internal predecessors, (1038), 287 states have call successors, (287), 83 states have call predecessors, (287), 82 states have return successors, (283), 279 states have call predecessors, (283), 283 states have call successors, (283) [2021-05-02 20:33:26,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1608 transitions. [2021-05-02 20:33:26,001 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1608 transitions. Word has length 90 [2021-05-02 20:33:26,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:26,001 INFO L480 AbstractCegarLoop]: Abstraction has 1177 states and 1608 transitions. [2021-05-02 20:33:26,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:33:26,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1608 transitions. [2021-05-02 20:33:26,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 20:33:26,002 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:26,002 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 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 20:33:26,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 20:33:26,209 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:26,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 2 times [2021-05-02 20:33:26,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:26,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639045675] [2021-05-02 20:33:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:26,213 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:26,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638253423] [2021-05-02 20:33:26,213 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:26,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:26,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:26,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 101 conjunts are in the unsatisfiable core [2021-05-02 20:33:26,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:26,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 51 proven. 42 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-05-02 20:33:26,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:26,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639045675] [2021-05-02 20:33:26,954 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:26,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638253423] [2021-05-02 20:33:26,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638253423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:26,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:26,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 20:33:26,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667914983] [2021-05-02 20:33:26,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 20:33:26,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:26,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 20:33:26,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:33:26,955 INFO L87 Difference]: Start difference. First operand 1177 states and 1608 transitions. Second operand has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 20:33:27,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:27,870 INFO L93 Difference]: Finished difference Result 1265 states and 1733 transitions. [2021-05-02 20:33:27,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:33:27,871 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 88 [2021-05-02 20:33:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:27,874 INFO L225 Difference]: With dead ends: 1265 [2021-05-02 20:33:27,874 INFO L226 Difference]: Without dead ends: 1264 [2021-05-02 20:33:27,874 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 669.7ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-05-02 20:33:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-05-02 20:33:27,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1243. [2021-05-02 20:33:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 845 states have (on average 1.2899408284023668) internal successors, (1090), 853 states have internal predecessors, (1090), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 20:33:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1708 transitions. [2021-05-02 20:33:27,892 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1708 transitions. Word has length 88 [2021-05-02 20:33:27,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:27,892 INFO L480 AbstractCegarLoop]: Abstraction has 1243 states and 1708 transitions. [2021-05-02 20:33:27,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 20:33:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1708 transitions. [2021-05-02 20:33:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 20:33:27,893 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:27,893 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 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] [2021-05-02 20:33:28,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:28,108 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:28,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:28,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1734422414, now seen corresponding path program 2 times [2021-05-02 20:33:28,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:28,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812769956] [2021-05-02 20:33:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:28,118 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:28,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429640168] [2021-05-02 20:33:28,118 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:28,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:28,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:28,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:33:28,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:28,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:33:28,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:28,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812769956] [2021-05-02 20:33:28,342 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:28,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429640168] [2021-05-02 20:33:28,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429640168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:28,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:28,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:33:28,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483047338] [2021-05-02 20:33:28,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:33:28,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:28,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:33:28,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:28,345 INFO L87 Difference]: Start difference. First operand 1243 states and 1708 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:28,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:28,539 INFO L93 Difference]: Finished difference Result 1273 states and 1735 transitions. [2021-05-02 20:33:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:33:28,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2021-05-02 20:33:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:28,549 INFO L225 Difference]: With dead ends: 1273 [2021-05-02 20:33:28,549 INFO L226 Difference]: Without dead ends: 1273 [2021-05-02 20:33:28,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:33:28,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-05-02 20:33:28,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1254. [2021-05-02 20:33:28,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 856 states have (on average 1.286214953271028) internal successors, (1101), 864 states have internal predecessors, (1101), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 20:33:28,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1719 transitions. [2021-05-02 20:33:28,567 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1719 transitions. Word has length 91 [2021-05-02 20:33:28,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:28,567 INFO L480 AbstractCegarLoop]: Abstraction has 1254 states and 1719 transitions. [2021-05-02 20:33:28,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1719 transitions. [2021-05-02 20:33:28,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 20:33:28,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:28,568 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 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, 1] [2021-05-02 20:33:28,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 20:33:28,781 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:28,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash 292128969, now seen corresponding path program 1 times [2021-05-02 20:33:28,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:28,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193007728] [2021-05-02 20:33:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:28,786 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:28,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609141741] [2021-05-02 20:33:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:28,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:33:28,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:28,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:33:29,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:29,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193007728] [2021-05-02 20:33:29,016 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:29,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609141741] [2021-05-02 20:33:29,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609141741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:29,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:29,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:33:29,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176108878] [2021-05-02 20:33:29,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:33:29,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:29,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:33:29,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:29,018 INFO L87 Difference]: Start difference. First operand 1254 states and 1719 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:29,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:29,201 INFO L93 Difference]: Finished difference Result 1280 states and 1741 transitions. [2021-05-02 20:33:29,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:33:29,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2021-05-02 20:33:29,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:29,205 INFO L225 Difference]: With dead ends: 1280 [2021-05-02 20:33:29,205 INFO L226 Difference]: Without dead ends: 1280 [2021-05-02 20:33:29,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:33:29,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-05-02 20:33:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1274. [2021-05-02 20:33:29,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 876 states have (on average 1.278538812785388) internal successors, (1120), 884 states have internal predecessors, (1120), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 20:33:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1738 transitions. [2021-05-02 20:33:29,223 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1738 transitions. Word has length 93 [2021-05-02 20:33:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:29,223 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 1738 transitions. [2021-05-02 20:33:29,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1738 transitions. [2021-05-02 20:33:29,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:33:29,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:29,224 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 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] [2021-05-02 20:33:29,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 20:33:29,441 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:29,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1848812608, now seen corresponding path program 2 times [2021-05-02 20:33:29,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:29,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186388192] [2021-05-02 20:33:29,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:29,445 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:29,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081538839] [2021-05-02 20:33:29,445 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:29,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:29,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:29,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:33:29,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:29,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-05-02 20:33:29,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:29,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186388192] [2021-05-02 20:33:29,709 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:29,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081538839] [2021-05-02 20:33:29,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081538839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:29,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:29,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:33:29,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714836896] [2021-05-02 20:33:29,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:33:29,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:29,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:33:29,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:29,710 INFO L87 Difference]: Start difference. First operand 1274 states and 1738 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:33:30,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:30,263 INFO L93 Difference]: Finished difference Result 1569 states and 2212 transitions. [2021-05-02 20:33:30,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 20:33:30,266 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 97 [2021-05-02 20:33:30,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:30,270 INFO L225 Difference]: With dead ends: 1569 [2021-05-02 20:33:30,270 INFO L226 Difference]: Without dead ends: 1569 [2021-05-02 20:33:30,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 20:33:30,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-05-02 20:33:30,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1310. [2021-05-02 20:33:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 894 states have (on average 1.2818791946308725) internal successors, (1146), 902 states have internal predecessors, (1146), 327 states have call successors, (327), 89 states have call predecessors, (327), 88 states have return successors, (323), 318 states have call predecessors, (323), 323 states have call successors, (323) [2021-05-02 20:33:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1796 transitions. [2021-05-02 20:33:30,289 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1796 transitions. Word has length 97 [2021-05-02 20:33:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:30,289 INFO L480 AbstractCegarLoop]: Abstraction has 1310 states and 1796 transitions. [2021-05-02 20:33:30,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:33:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1796 transitions. [2021-05-02 20:33:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:33:30,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:30,290 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 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] [2021-05-02 20:33:30,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:30,505 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:30,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:30,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2096647522, now seen corresponding path program 3 times [2021-05-02 20:33:30,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:30,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825190456] [2021-05-02 20:33:30,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:30,509 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:30,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925281758] [2021-05-02 20:33:30,509 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:30,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:33:30,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:30,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:33:30,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:30,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:33:30,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:30,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825190456] [2021-05-02 20:33:30,735 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:30,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925281758] [2021-05-02 20:33:30,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925281758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:30,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:30,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:33:30,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170697597] [2021-05-02 20:33:30,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:33:30,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:30,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:33:30,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:30,736 INFO L87 Difference]: Start difference. First operand 1310 states and 1796 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:30,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:30,975 INFO L93 Difference]: Finished difference Result 1524 states and 2039 transitions. [2021-05-02 20:33:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 20:33:30,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2021-05-02 20:33:30,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:30,979 INFO L225 Difference]: With dead ends: 1524 [2021-05-02 20:33:30,979 INFO L226 Difference]: Without dead ends: 1524 [2021-05-02 20:33:30,979 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:33:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-05-02 20:33:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1466. [2021-05-02 20:33:30,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 986 states have (on average 1.268762677484787) internal successors, (1251), 995 states have internal predecessors, (1251), 368 states have call successors, (368), 112 states have call predecessors, (368), 111 states have return successors, (363), 358 states have call predecessors, (363), 363 states have call successors, (363) [2021-05-02 20:33:30,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 1982 transitions. [2021-05-02 20:33:30,998 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 1982 transitions. Word has length 97 [2021-05-02 20:33:30,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:30,998 INFO L480 AbstractCegarLoop]: Abstraction has 1466 states and 1982 transitions. [2021-05-02 20:33:30,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:30,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 1982 transitions. [2021-05-02 20:33:30,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:33:30,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:30,999 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 20:33:31,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:31,215 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:31,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:31,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1189405093, now seen corresponding path program 4 times [2021-05-02 20:33:31,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:31,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499369900] [2021-05-02 20:33:31,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:31,220 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:31,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237662023] [2021-05-02 20:33:31,220 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:31,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:33:31,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:31,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 20:33:31,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:31,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 33 proven. 61 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 20:33:31,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:31,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499369900] [2021-05-02 20:33:31,949 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:31,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237662023] [2021-05-02 20:33:31,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237662023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:31,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:31,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 20:33:31,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707582875] [2021-05-02 20:33:31,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 20:33:31,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:31,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 20:33:31,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:33:31,950 INFO L87 Difference]: Start difference. First operand 1466 states and 1982 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:33:33,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:33,028 INFO L93 Difference]: Finished difference Result 1529 states and 2075 transitions. [2021-05-02 20:33:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:33:33,029 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 97 [2021-05-02 20:33:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:33,033 INFO L225 Difference]: With dead ends: 1529 [2021-05-02 20:33:33,034 INFO L226 Difference]: Without dead ends: 1529 [2021-05-02 20:33:33,034 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 720.6ms TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-05-02 20:33:33,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2021-05-02 20:33:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1507. [2021-05-02 20:33:33,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1010 states have (on average 1.2742574257425743) internal successors, (1287), 1019 states have internal predecessors, (1287), 384 states have call successors, (384), 113 states have call predecessors, (384), 112 states have return successors, (379), 374 states have call predecessors, (379), 379 states have call successors, (379) [2021-05-02 20:33:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2050 transitions. [2021-05-02 20:33:33,056 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2050 transitions. Word has length 97 [2021-05-02 20:33:33,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:33,056 INFO L480 AbstractCegarLoop]: Abstraction has 1507 states and 2050 transitions. [2021-05-02 20:33:33,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:33:33,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2050 transitions. [2021-05-02 20:33:33,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 20:33:33,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:33,057 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 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] [2021-05-02 20:33:33,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:33,273 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:33,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:33,273 INFO L82 PathProgramCache]: Analyzing trace with hash 672019267, now seen corresponding path program 3 times [2021-05-02 20:33:33,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:33,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867146988] [2021-05-02 20:33:33,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:33,280 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:33,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444439019] [2021-05-02 20:33:33,280 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:33,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:33:33,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:33,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 20:33:33,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:33,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 120 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:33:33,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:33,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867146988] [2021-05-02 20:33:33,544 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:33,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444439019] [2021-05-02 20:33:33,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444439019] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:33,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:33,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:33:33,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291325334] [2021-05-02 20:33:33,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:33:33,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:33,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:33:33,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:33:33,545 INFO L87 Difference]: Start difference. First operand 1507 states and 2050 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:33,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:33,839 INFO L93 Difference]: Finished difference Result 1836 states and 2451 transitions. [2021-05-02 20:33:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 20:33:33,839 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 98 [2021-05-02 20:33:33,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:33,848 INFO L225 Difference]: With dead ends: 1836 [2021-05-02 20:33:33,848 INFO L226 Difference]: Without dead ends: 1836 [2021-05-02 20:33:33,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:33:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2021-05-02 20:33:33,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1737. [2021-05-02 20:33:33,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1161 states have (on average 1.2609819121447028) internal successors, (1464), 1186 states have internal predecessors, (1464), 442 states have call successors, (442), 134 states have call predecessors, (442), 133 states have return successors, (436), 416 states have call predecessors, (436), 436 states have call successors, (436) [2021-05-02 20:33:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2342 transitions. [2021-05-02 20:33:33,875 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2342 transitions. Word has length 98 [2021-05-02 20:33:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:33,875 INFO L480 AbstractCegarLoop]: Abstraction has 1737 states and 2342 transitions. [2021-05-02 20:33:33,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:33,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2342 transitions. [2021-05-02 20:33:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 20:33:33,877 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:33,877 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 20:33:34,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 20:33:34,093 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:34,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:34,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1115053491, now seen corresponding path program 1 times [2021-05-02 20:33:34,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:34,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293942810] [2021-05-02 20:33:34,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:34,101 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:34,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198724447] [2021-05-02 20:33:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:34,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:33:34,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:34,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 31 proven. 25 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-05-02 20:33:34,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:34,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293942810] [2021-05-02 20:33:34,407 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:34,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198724447] [2021-05-02 20:33:34,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198724447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:34,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:34,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:33:34,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171069132] [2021-05-02 20:33:34,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:33:34,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:34,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:33:34,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:33:34,408 INFO L87 Difference]: Start difference. First operand 1737 states and 2342 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:33:34,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:34,885 INFO L93 Difference]: Finished difference Result 2045 states and 2818 transitions. [2021-05-02 20:33:34,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 20:33:34,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 101 [2021-05-02 20:33:34,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:34,891 INFO L225 Difference]: With dead ends: 2045 [2021-05-02 20:33:34,891 INFO L226 Difference]: Without dead ends: 2045 [2021-05-02 20:33:34,891 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 325.6ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-05-02 20:33:34,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-05-02 20:33:34,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1881. [2021-05-02 20:33:34,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1224 states have (on average 1.2679738562091503) internal successors, (1552), 1266 states have internal predecessors, (1552), 518 states have call successors, (518), 139 states have call predecessors, (518), 138 states have return successors, (512), 475 states have call predecessors, (512), 512 states have call successors, (512) [2021-05-02 20:33:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2582 transitions. [2021-05-02 20:33:34,918 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2582 transitions. Word has length 101 [2021-05-02 20:33:34,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:34,919 INFO L480 AbstractCegarLoop]: Abstraction has 1881 states and 2582 transitions. [2021-05-02 20:33:34,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:33:34,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2582 transitions. [2021-05-02 20:33:34,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 20:33:34,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:34,920 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 3, 2, 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 20:33:35,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:35,133 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:35,133 INFO L82 PathProgramCache]: Analyzing trace with hash 114401441, now seen corresponding path program 1 times [2021-05-02 20:33:35,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:35,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843719567] [2021-05-02 20:33:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:35,137 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:35,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392606720] [2021-05-02 20:33:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:35,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:33:35,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:35,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 103 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:33:35,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:35,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843719567] [2021-05-02 20:33:35,400 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:35,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392606720] [2021-05-02 20:33:35,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392606720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:35,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:35,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:33:35,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600893755] [2021-05-02 20:33:35,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:33:35,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:35,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:33:35,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:35,401 INFO L87 Difference]: Start difference. First operand 1881 states and 2582 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:35,627 INFO L93 Difference]: Finished difference Result 1891 states and 2569 transitions. [2021-05-02 20:33:35,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 20:33:35,633 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 99 [2021-05-02 20:33:35,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:35,642 INFO L225 Difference]: With dead ends: 1891 [2021-05-02 20:33:35,642 INFO L226 Difference]: Without dead ends: 1891 [2021-05-02 20:33:35,642 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:33:35,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-05-02 20:33:35,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1877. [2021-05-02 20:33:35,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1220 states have (on average 1.2532786885245901) internal successors, (1529), 1262 states have internal predecessors, (1529), 518 states have call successors, (518), 139 states have call predecessors, (518), 138 states have return successors, (512), 475 states have call predecessors, (512), 512 states have call successors, (512) [2021-05-02 20:33:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 2559 transitions. [2021-05-02 20:33:35,671 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 2559 transitions. Word has length 99 [2021-05-02 20:33:35,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:35,671 INFO L480 AbstractCegarLoop]: Abstraction has 1877 states and 2559 transitions. [2021-05-02 20:33:35,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:35,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 2559 transitions. [2021-05-02 20:33:35,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 20:33:35,672 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:35,672 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2021-05-02 20:33:35,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:35,888 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:35,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:35,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1944004338, now seen corresponding path program 3 times [2021-05-02 20:33:35,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:35,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662610778] [2021-05-02 20:33:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:35,893 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:35,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288110162] [2021-05-02 20:33:35,893 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:36,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:33:36,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:36,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 20:33:36,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:36,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-05-02 20:33:36,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:36,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662610778] [2021-05-02 20:33:36,504 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:36,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288110162] [2021-05-02 20:33:36,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288110162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:36,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:36,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:33:36,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938284738] [2021-05-02 20:33:36,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:33:36,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:36,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:33:36,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:33:36,505 INFO L87 Difference]: Start difference. First operand 1877 states and 2559 transitions. Second operand has 15 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:39,221 INFO L93 Difference]: Finished difference Result 2069 states and 2850 transitions. [2021-05-02 20:33:39,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:33:39,222 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 104 [2021-05-02 20:33:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:39,222 INFO L225 Difference]: With dead ends: 2069 [2021-05-02 20:33:39,222 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:33:39,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 470.4ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-05-02 20:33:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:33:39,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:33:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:33:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:33:39,223 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 104 [2021-05-02 20:33:39,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:39,223 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:33:39,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:33:39,223 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:33:39,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 20:33:39,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:33:39 BasicIcfg [2021-05-02 20:33:39,427 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:33:39,427 INFO L168 Benchmark]: Toolchain (without parser) took 36945.88 ms. Allocated memory was 222.3 MB in the beginning and 352.3 MB in the end (delta: 130.0 MB). Free memory was 186.8 MB in the beginning and 161.6 MB in the end (delta: 25.2 MB). Peak memory consumption was 156.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:39,428 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 222.3 MB. Free memory is still 203.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:33:39,428 INFO L168 Benchmark]: CACSL2BoogieTranslator took 181.26 ms. Allocated memory is still 222.3 MB. Free memory was 186.6 MB in the beginning and 204.5 MB in the end (delta: -17.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:39,428 INFO L168 Benchmark]: Boogie Preprocessor took 39.82 ms. Allocated memory is still 222.3 MB. Free memory was 204.5 MB in the beginning and 202.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:39,428 INFO L168 Benchmark]: RCFGBuilder took 365.46 ms. Allocated memory is still 222.3 MB. Free memory was 202.8 MB in the beginning and 185.3 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:39,428 INFO L168 Benchmark]: IcfgTransformer took 20.28 ms. Allocated memory is still 222.3 MB. Free memory was 185.3 MB in the beginning and 184.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:39,428 INFO L168 Benchmark]: TraceAbstraction took 36333.38 ms. Allocated memory was 222.3 MB in the beginning and 352.3 MB in the end (delta: 130.0 MB). Free memory was 183.2 MB in the beginning and 161.6 MB in the end (delta: 21.6 MB). Peak memory consumption was 152.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:39,428 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 222.3 MB. Free memory is still 203.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 181.26 ms. Allocated memory is still 222.3 MB. Free memory was 186.6 MB in the beginning and 204.5 MB in the end (delta: -17.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.82 ms. Allocated memory is still 222.3 MB. Free memory was 204.5 MB in the beginning and 202.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 365.46 ms. Allocated memory is still 222.3 MB. Free memory was 202.8 MB in the beginning and 185.3 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 20.28 ms. Allocated memory is still 222.3 MB. Free memory was 185.3 MB in the beginning and 184.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 36333.38 ms. Allocated memory was 222.3 MB in the beginning and 352.3 MB in the end (delta: 130.0 MB). Free memory was 183.2 MB in the beginning and 161.6 MB in the end (delta: 21.6 MB). Peak memory consumption was 152.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 36292.0ms, OverallIterations: 45, TraceHistogramMax: 13, EmptinessCheckTime: 45.7ms, AutomataDifference: 15062.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2785 SDtfs, 4012 SDslu, 14015 SDs, 0 SdLazy, 10556 SolverSat, 2295 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 8343.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3047 GetRequests, 2371 SyntacticMatches, 5 SemanticMatches, 671 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 7612.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1881occurred in iteration=43, InterpolantAutomatonStates: 624, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 537.2ms AutomataMinimizationTime, 45 MinimizatonAttempts, 1825 StatesRemovedByMinimization, 41 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 384.0ms SsaConstructionTime, 1184.5ms SatisfiabilityAnalysisTime, 8365.9ms InterpolantComputationTime, 2802 NumberOfCodeBlocks, 2661 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 2757 ConstructedInterpolants, 0 QuantifiedInterpolants, 14440 SizeOfPredicates, 279 NumberOfNonLiveVariables, 10359 ConjunctsInSsa, 1093 ConjunctsInUnsatCore, 45 InterpolantComputations, 9 PerfectInterpolantSequences, 2753/3873 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...