/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/cohendiv-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:45:55,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:45:55,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:45:55,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:45:55,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:45:55,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:45:55,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:45:55,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:45:55,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:45:55,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:45:55,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:45:55,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:45:55,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:45:55,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:45:55,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:45:55,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:45:55,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:45:55,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:45:55,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:45:55,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:45:55,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:45:55,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:45:55,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:45:55,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:45:55,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:45:55,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:45:55,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:45:55,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:45:55,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:45:55,230 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:45:55,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:45:55,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:45:55,232 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:45:55,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:45:55,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:45:55,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:45:55,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:45:55,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:45:55,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:45:55,232 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:45:55,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:45:55,233 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:45:55,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:45:55,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:45:55,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:45:55,233 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:45:55,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:45:55,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:45:55,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:45:55,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:45:55,234 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:45:55,234 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:45:55,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:45:55,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:45:55,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:45:55,444 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:45:55,444 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:45:55,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound50.c [2021-05-02 19:45:55,502 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0e74c0ed/aaf7666c7b7743ceb69cbd57dace4493/FLAG0c57090df [2021-05-02 19:45:55,831 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:45:55,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound50.c [2021-05-02 19:45:55,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0e74c0ed/aaf7666c7b7743ceb69cbd57dace4493/FLAG0c57090df [2021-05-02 19:45:55,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0e74c0ed/aaf7666c7b7743ceb69cbd57dace4493 [2021-05-02 19:45:55,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:45:55,846 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:45:55,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:45:55,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:45:55,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:45:55,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:45:55" (1/1) ... [2021-05-02 19:45:55,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@587cd349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:55, skipping insertion in model container [2021-05-02 19:45:55,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:45:55" (1/1) ... [2021-05-02 19:45:55,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:45:55,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:45:55,974 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/cohendiv-ll_unwindbound50.c[576,589] [2021-05-02 19:45:55,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:45:55,995 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:45:56,049 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/cohendiv-ll_unwindbound50.c[576,589] [2021-05-02 19:45:56,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:45:56,073 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:45:56,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:56 WrapperNode [2021-05-02 19:45:56,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:45:56,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:45:56,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:45:56,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:45:56,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:56" (1/1) ... [2021-05-02 19:45:56,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:56" (1/1) ... [2021-05-02 19:45:56,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:56" (1/1) ... [2021-05-02 19:45:56,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:56" (1/1) ... [2021-05-02 19:45:56,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:56" (1/1) ... [2021-05-02 19:45:56,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:56" (1/1) ... [2021-05-02 19:45:56,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:56" (1/1) ... [2021-05-02 19:45:56,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:45:56,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:45:56,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:45:56,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:45:56,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:56" (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 19:45:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:45:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:45:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:45:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:45:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:45:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:45:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:45:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:45:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:45:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:45:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:45:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:45:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:45:56,163 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:45:56,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:45:56,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:45:56,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:45:56,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:45:56,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:45:56,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:45:56,385 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:45:56,385 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 19:45:56,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:45:56 BoogieIcfgContainer [2021-05-02 19:45:56,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:45:56,387 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:45:56,387 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:45:56,387 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:45:56,389 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:45:56" (1/1) ... [2021-05-02 19:45:56,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:45:56 BasicIcfg [2021-05-02 19:45:56,426 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:45:56,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:45:56,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:45:56,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:45:56,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:45:55" (1/4) ... [2021-05-02 19:45:56,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d539bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:45:56, skipping insertion in model container [2021-05-02 19:45:56,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:56" (2/4) ... [2021-05-02 19:45:56,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d539bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:45:56, skipping insertion in model container [2021-05-02 19:45:56,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:45:56" (3/4) ... [2021-05-02 19:45:56,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d539bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:45:56, skipping insertion in model container [2021-05-02 19:45:56,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:45:56" (4/4) ... [2021-05-02 19:45:56,431 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound50.cJordan [2021-05-02 19:45:56,434 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:45:56,441 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:45:56,451 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:45:56,478 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:45:56,478 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:45:56,478 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:45:56,478 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:45:56,478 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:45:56,478 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:45:56,478 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:45:56,478 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:45:56,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 19:45:56,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 19:45:56,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:56,509 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:45:56,509 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:56,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:56,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2021-05-02 19:45:56,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:56,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362923607] [2021-05-02 19:45:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:56,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:45:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:56,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:45:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:45:56,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:56,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362923607] [2021-05-02 19:45:56,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362923607] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:45:56,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:45:56,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:45:56,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649614106] [2021-05-02 19:45:56,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:45:56,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:56,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:45:56,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:45:56,731 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:45:56,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:56,851 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-02 19:45:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:45:56,852 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 19:45:56,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:56,857 INFO L225 Difference]: With dead ends: 39 [2021-05-02 19:45:56,857 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 19:45:56,858 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:45:56,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 19:45:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 19:45:56,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 19:45:56,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-02 19:45:56,902 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-05-02 19:45:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:56,902 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-02 19:45:56,902 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:45:56,902 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-02 19:45:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 19:45:56,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:56,903 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:45:56,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:45:56,903 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:56,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:56,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2021-05-02 19:45:56,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:56,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394648239] [2021-05-02 19:45:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:56,916 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:56,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726896639] [2021-05-02 19:45:56,916 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 19:45:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:56,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 19:45:56,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:57,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:45:57,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:57,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394648239] [2021-05-02 19:45:57,059 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:57,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726896639] [2021-05-02 19:45:57,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726896639] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:45:57,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:45:57,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:45:57,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123509495] [2021-05-02 19:45:57,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 19:45:57,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:57,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 19:45:57,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:45:57,061 INFO L87 Difference]: Start difference. First operand 33 states and 42 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:45:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:57,070 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-02 19:45:57,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 19:45:57,071 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 19:45:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:57,071 INFO L225 Difference]: With dead ends: 35 [2021-05-02 19:45:57,071 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 19:45:57,072 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:45:57,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 19:45:57,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 19:45:57,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 19:45:57,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 19:45:57,076 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-05-02 19:45:57,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:57,076 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 19:45:57,076 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:45:57,076 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 19:45:57,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 19:45:57,077 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:57,077 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:45:57,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:45:57,293 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:57,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2021-05-02 19:45:57,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:57,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651313295] [2021-05-02 19:45:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:57,304 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:57,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142001746] [2021-05-02 19:45:57,304 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 19:45:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:57,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:45:57,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:57,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:45:57,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:57,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651313295] [2021-05-02 19:45:57,398 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:57,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142001746] [2021-05-02 19:45:57,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142001746] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:45:57,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:45:57,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:45:57,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923618769] [2021-05-02 19:45:57,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:45:57,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:57,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:45:57,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:45:57,399 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:45:57,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:57,456 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-02 19:45:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:45:57,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 19:45:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:57,457 INFO L225 Difference]: With dead ends: 43 [2021-05-02 19:45:57,457 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 19:45:57,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:45:57,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 19:45:57,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 19:45:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 19:45:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 19:45:57,462 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2021-05-02 19:45:57,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:57,462 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 19:45:57,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:45:57,463 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 19:45:57,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 19:45:57,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:57,463 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:45:57,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:45:57,679 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:57,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:57,679 INFO L82 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2021-05-02 19:45:57,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:57,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795961681] [2021-05-02 19:45:57,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:57,688 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:57,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120897466] [2021-05-02 19:45:57,688 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 19:45:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:57,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:45:57,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:57,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:45:57,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:57,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795961681] [2021-05-02 19:45:57,849 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:57,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120897466] [2021-05-02 19:45:57,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120897466] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:45:57,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:45:57,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:45:57,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672088021] [2021-05-02 19:45:57,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:45:57,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:57,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:45:57,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:45:57,850 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 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 19:45:57,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:57,928 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-05-02 19:45:57,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:45:57,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 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 23 [2021-05-02 19:45:57,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:57,929 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:45:57,929 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 19:45:57,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:45:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 19:45:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 19:45:57,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 19:45:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-02 19:45:57,935 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2021-05-02 19:45:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:57,935 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-02 19:45:57,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 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 19:45:57,935 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-02 19:45:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 19:45:57,935 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:57,936 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:45:58,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:45:58,151 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:58,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:58,151 INFO L82 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2021-05-02 19:45:58,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:58,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299192185] [2021-05-02 19:45:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:58,159 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:58,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797974133] [2021-05-02 19:45:58,160 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 19:45:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:58,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:45:58,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:58,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,293 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 19:45:58,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:58,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299192185] [2021-05-02 19:45:58,293 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:58,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797974133] [2021-05-02 19:45:58,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797974133] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:45:58,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:45:58,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:45:58,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619248574] [2021-05-02 19:45:58,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:45:58,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:58,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:45:58,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:45:58,294 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:45:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:58,364 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2021-05-02 19:45:58,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:45:58,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-05-02 19:45:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:58,366 INFO L225 Difference]: With dead ends: 81 [2021-05-02 19:45:58,366 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 19:45:58,366 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 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 19:45:58,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 19:45:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-05-02 19:45:58,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:45:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-05-02 19:45:58,372 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2021-05-02 19:45:58,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:58,372 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-05-02 19:45:58,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:45:58,372 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-05-02 19:45:58,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 19:45:58,373 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:58,373 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 19:45:58,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:45:58,588 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:58,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:58,589 INFO L82 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2021-05-02 19:45:58,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:58,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288931632] [2021-05-02 19:45:58,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:58,596 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:58,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018790703] [2021-05-02 19:45:58,597 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 19:45:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:58,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:45:58,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:58,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:45:58,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:58,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288931632] [2021-05-02 19:45:58,740 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:58,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018790703] [2021-05-02 19:45:58,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018790703] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:45:58,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:45:58,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 19:45:58,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301312113] [2021-05-02 19:45:58,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:45:58,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:58,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:45:58,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:45:58,741 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:45:58,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:58,760 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2021-05-02 19:45:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 19:45:58,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 19:45:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:58,762 INFO L225 Difference]: With dead ends: 78 [2021-05-02 19:45:58,762 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 19:45:58,762 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:45:58,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 19:45:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 19:45:58,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:45:58,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-05-02 19:45:58,767 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2021-05-02 19:45:58,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:58,767 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-05-02 19:45:58,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:45:58,768 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-05-02 19:45:58,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 19:45:58,768 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:58,768 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:45:58,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 19:45:58,984 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1527688582, now seen corresponding path program 1 times [2021-05-02 19:45:58,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:58,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431958780] [2021-05-02 19:45:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:59,011 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:59,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063271501] [2021-05-02 19:45:59,012 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 19:45:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:59,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 19:45:59,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:59,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 19:45:59,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:59,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431958780] [2021-05-02 19:45:59,195 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:59,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063271501] [2021-05-02 19:45:59,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063271501] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:45:59,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:45:59,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:45:59,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483375576] [2021-05-02 19:45:59,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:45:59,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:59,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:45:59,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:45:59,196 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 19:45:59,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:59,265 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2021-05-02 19:45:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:45:59,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 19:45:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:59,267 INFO L225 Difference]: With dead ends: 82 [2021-05-02 19:45:59,267 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 19:45:59,267 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:45:59,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 19:45:59,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-02 19:45:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:45:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-05-02 19:45:59,274 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2021-05-02 19:45:59,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:59,274 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-05-02 19:45:59,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 19:45:59,275 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-05-02 19:45:59,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 19:45:59,275 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:59,275 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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 19:45:59,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:45:59,476 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:59,476 INFO L82 PathProgramCache]: Analyzing trace with hash 800232443, now seen corresponding path program 1 times [2021-05-02 19:45:59,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:59,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114700580] [2021-05-02 19:45:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:59,483 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:59,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210294907] [2021-05-02 19:45:59,483 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 19:45:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:59,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:45:59,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:59,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 19:45:59,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:59,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114700580] [2021-05-02 19:45:59,696 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:59,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210294907] [2021-05-02 19:45:59,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210294907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:45:59,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:45:59,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:45:59,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286839192] [2021-05-02 19:45:59,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:45:59,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:59,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:45:59,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:45:59,698 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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 19:45:59,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:59,802 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2021-05-02 19:45:59,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:45:59,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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 47 [2021-05-02 19:45:59,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:59,803 INFO L225 Difference]: With dead ends: 86 [2021-05-02 19:45:59,803 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 19:45:59,803 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:45:59,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 19:45:59,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-02 19:45:59,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:45:59,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-05-02 19:45:59,808 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2021-05-02 19:45:59,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:59,808 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-05-02 19:45:59,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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 19:45:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-05-02 19:45:59,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 19:45:59,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:59,809 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:00,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:00,025 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:00,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:00,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1984817020, now seen corresponding path program 1 times [2021-05-02 19:46:00,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:00,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210162405] [2021-05-02 19:46:00,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:00,031 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:00,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813357820] [2021-05-02 19:46:00,032 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 19:46:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:00,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:46:00,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:00,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 19:46:00,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:00,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210162405] [2021-05-02 19:46:00,196 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:00,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813357820] [2021-05-02 19:46:00,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813357820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:00,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:00,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:46:00,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119996666] [2021-05-02 19:46:00,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:46:00,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:00,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:46:00,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:46:00,197 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 19:46:00,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:00,237 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2021-05-02 19:46:00,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:46:00,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-05-02 19:46:00,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:00,238 INFO L225 Difference]: With dead ends: 108 [2021-05-02 19:46:00,238 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 19:46:00,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:46:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 19:46:00,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-05-02 19:46:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 19:46:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-05-02 19:46:00,243 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 50 [2021-05-02 19:46:00,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:00,243 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-05-02 19:46:00,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 19:46:00,243 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-05-02 19:46:00,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 19:46:00,244 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:00,244 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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 19:46:00,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 19:46:00,462 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:00,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:00,462 INFO L82 PathProgramCache]: Analyzing trace with hash 960315114, now seen corresponding path program 1 times [2021-05-02 19:46:00,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:00,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808554020] [2021-05-02 19:46:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:00,468 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:00,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252958698] [2021-05-02 19:46:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:46:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:00,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 19:46:00,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:00,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 19:46:00,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:00,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808554020] [2021-05-02 19:46:00,729 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:00,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252958698] [2021-05-02 19:46:00,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252958698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:00,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:00,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:46:00,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789952054] [2021-05-02 19:46:00,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:46:00,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:00,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:46:00,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:46:00,730 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:46:00,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:00,858 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2021-05-02 19:46:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:46:00,858 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2021-05-02 19:46:00,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:00,859 INFO L225 Difference]: With dead ends: 116 [2021-05-02 19:46:00,859 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 19:46:00,860 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:46:00,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 19:46:00,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-02 19:46:00,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 19:46:00,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2021-05-02 19:46:00,864 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 55 [2021-05-02 19:46:00,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:00,864 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2021-05-02 19:46:00,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:46:00,864 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2021-05-02 19:46:00,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 19:46:00,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:00,865 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:01,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:01,081 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:01,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1119467195, now seen corresponding path program 1 times [2021-05-02 19:46:01,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:01,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719875313] [2021-05-02 19:46:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:01,088 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:01,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712822982] [2021-05-02 19:46:01,088 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 19:46:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:01,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:46:01,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:01,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 19:46:01,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:01,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719875313] [2021-05-02 19:46:01,239 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:01,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712822982] [2021-05-02 19:46:01,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712822982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:01,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:01,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:46:01,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718000115] [2021-05-02 19:46:01,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:46:01,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:01,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:46:01,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:46:01,240 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:46:01,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:01,277 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2021-05-02 19:46:01,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:46:01,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 58 [2021-05-02 19:46:01,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:01,278 INFO L225 Difference]: With dead ends: 106 [2021-05-02 19:46:01,278 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 19:46:01,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:46:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 19:46:01,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-02 19:46:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 70 states have internal predecessors, (78), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 19:46:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-05-02 19:46:01,282 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 58 [2021-05-02 19:46:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:01,282 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-05-02 19:46:01,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:46:01,283 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-05-02 19:46:01,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 19:46:01,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:01,283 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 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 19:46:01,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:01,499 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:01,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:01,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1669598821, now seen corresponding path program 1 times [2021-05-02 19:46:01,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:01,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578476634] [2021-05-02 19:46:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:01,505 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:01,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420203223] [2021-05-02 19:46:01,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:01,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 19:46:01,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:01,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 19:46:01,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:01,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578476634] [2021-05-02 19:46:01,677 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:01,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420203223] [2021-05-02 19:46:01,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420203223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:01,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:01,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:46:01,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627065431] [2021-05-02 19:46:01,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:46:01,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:01,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:46:01,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:46:01,678 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 19:46:01,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:01,729 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-05-02 19:46:01,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:46:01,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 74 [2021-05-02 19:46:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:01,730 INFO L225 Difference]: With dead ends: 128 [2021-05-02 19:46:01,730 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 19:46:01,730 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:46:01,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 19:46:01,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-05-02 19:46:01,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 84 states have internal predecessors, (92), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 19:46:01,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2021-05-02 19:46:01,734 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 74 [2021-05-02 19:46:01,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:01,734 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2021-05-02 19:46:01,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 19:46:01,735 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2021-05-02 19:46:01,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 19:46:01,735 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:01,735 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 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 19:46:01,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 19:46:01,951 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:01,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:01,952 INFO L82 PathProgramCache]: Analyzing trace with hash -286098381, now seen corresponding path program 1 times [2021-05-02 19:46:01,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:01,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603081211] [2021-05-02 19:46:01,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:01,957 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:01,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182460525] [2021-05-02 19:46:01,957 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 19:46:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:02,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 19:46:02,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:02,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-05-02 19:46:02,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603081211] [2021-05-02 19:46:02,474 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182460525] [2021-05-02 19:46:02,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182460525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:02,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:02,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:46:02,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399815398] [2021-05-02 19:46:02,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:46:02,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:02,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:46:02,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:46:02,475 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 19:46:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:02,761 INFO L93 Difference]: Finished difference Result 156 states and 188 transitions. [2021-05-02 19:46:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:46:02,761 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 79 [2021-05-02 19:46:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:02,762 INFO L225 Difference]: With dead ends: 156 [2021-05-02 19:46:02,762 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 19:46:02,762 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 216.2ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:46:02,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 19:46:02,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-05-02 19:46:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 98 states have internal predecessors, (110), 37 states have call successors, (37), 19 states have call predecessors, (37), 18 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 19:46:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 182 transitions. [2021-05-02 19:46:02,767 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 182 transitions. Word has length 79 [2021-05-02 19:46:02,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:02,767 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 182 transitions. [2021-05-02 19:46:02,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 19:46:02,767 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 182 transitions. [2021-05-02 19:46:02,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 19:46:02,768 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:02,768 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:02,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 19:46:02,988 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:02,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:02,988 INFO L82 PathProgramCache]: Analyzing trace with hash -792688430, now seen corresponding path program 2 times [2021-05-02 19:46:02,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:02,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053244580] [2021-05-02 19:46:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:02,993 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:02,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089697375] [2021-05-02 19:46:02,993 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 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 19:46:03,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:46:03,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:03,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 19:46:03,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:03,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 140 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 19:46:03,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:03,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053244580] [2021-05-02 19:46:03,186 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:03,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089697375] [2021-05-02 19:46:03,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089697375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:03,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:03,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:46:03,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893337110] [2021-05-02 19:46:03,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:46:03,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:03,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:46:03,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:46:03,187 INFO L87 Difference]: Start difference. First operand 151 states and 182 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 19:46:03,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:03,244 INFO L93 Difference]: Finished difference Result 154 states and 185 transitions. [2021-05-02 19:46:03,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:46:03,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 82 [2021-05-02 19:46:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:03,246 INFO L225 Difference]: With dead ends: 154 [2021-05-02 19:46:03,246 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 19:46:03,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:46:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 19:46:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-05-02 19:46:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.153061224489796) internal successors, (113), 100 states have internal predecessors, (113), 37 states have call successors, (37), 19 states have call predecessors, (37), 18 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 19:46:03,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2021-05-02 19:46:03,250 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 82 [2021-05-02 19:46:03,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:03,250 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2021-05-02 19:46:03,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 19:46:03,250 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2021-05-02 19:46:03,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 19:46:03,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:03,251 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 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, 1, 1] [2021-05-02 19:46:03,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 19:46:03,467 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:03,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:03,467 INFO L82 PathProgramCache]: Analyzing trace with hash -2126505818, now seen corresponding path program 1 times [2021-05-02 19:46:03,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:03,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841919522] [2021-05-02 19:46:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:03,472 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:03,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791805367] [2021-05-02 19:46:03,473 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 19:46:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:03,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 19:46:03,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:03,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 27 proven. 191 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-02 19:46:03,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:03,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841919522] [2021-05-02 19:46:03,652 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:03,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791805367] [2021-05-02 19:46:03,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791805367] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:03,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:03,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:46:03,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390551749] [2021-05-02 19:46:03,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:46:03,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:03,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:46:03,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:46:03,653 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 19:46:03,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:03,740 INFO L93 Difference]: Finished difference Result 180 states and 211 transitions. [2021-05-02 19:46:03,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:46:03,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 90 [2021-05-02 19:46:03,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:03,742 INFO L225 Difference]: With dead ends: 180 [2021-05-02 19:46:03,742 INFO L226 Difference]: Without dead ends: 180 [2021-05-02 19:46:03,742 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:46:03,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-02 19:46:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2021-05-02 19:46:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 114 states have (on average 1.131578947368421) internal successors, (129), 116 states have internal predecessors, (129), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 19:46:03,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 209 transitions. [2021-05-02 19:46:03,746 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 209 transitions. Word has length 90 [2021-05-02 19:46:03,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:03,746 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 209 transitions. [2021-05-02 19:46:03,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 19:46:03,747 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 209 transitions. [2021-05-02 19:46:03,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 19:46:03,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:03,747 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 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, 1, 1, 1, 1, 1] [2021-05-02 19:46:03,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:03,963 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:03,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:03,964 INFO L82 PathProgramCache]: Analyzing trace with hash -169757262, now seen corresponding path program 2 times [2021-05-02 19:46:03,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:03,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427372187] [2021-05-02 19:46:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:03,969 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:03,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247209674] [2021-05-02 19:46:03,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:04,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:46:04,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:04,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 19:46:04,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:04,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 26 proven. 270 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 19:46:04,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:04,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427372187] [2021-05-02 19:46:04,203 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:04,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247209674] [2021-05-02 19:46:04,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247209674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:04,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:04,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:46:04,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183909953] [2021-05-02 19:46:04,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:46:04,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:04,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:46:04,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:46:04,204 INFO L87 Difference]: Start difference. First operand 178 states and 209 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 19:46:04,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:04,282 INFO L93 Difference]: Finished difference Result 181 states and 212 transitions. [2021-05-02 19:46:04,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:46:04,282 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 98 [2021-05-02 19:46:04,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:04,283 INFO L225 Difference]: With dead ends: 181 [2021-05-02 19:46:04,283 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 19:46:04,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:46:04,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 19:46:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-05-02 19:46:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 119 states have internal predecessors, (132), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 19:46:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 212 transitions. [2021-05-02 19:46:04,289 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 212 transitions. Word has length 98 [2021-05-02 19:46:04,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:04,290 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 212 transitions. [2021-05-02 19:46:04,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 19:46:04,290 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 212 transitions. [2021-05-02 19:46:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 19:46:04,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:04,290 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 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] [2021-05-02 19:46:04,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 19:46:04,507 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:04,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:04,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1237757564, now seen corresponding path program 2 times [2021-05-02 19:46:04,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:04,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945262209] [2021-05-02 19:46:04,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:04,512 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:04,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977869202] [2021-05-02 19:46:04,512 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 19:46:04,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:46:04,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:04,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 19:46:04,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:04,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 51 proven. 40 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 19:46:04,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:04,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945262209] [2021-05-02 19:46:04,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:04,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977869202] [2021-05-02 19:46:04,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977869202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:04,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:04,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:46:04,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636807538] [2021-05-02 19:46:04,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:46:04,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:04,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:46:04,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:46:04,822 INFO L87 Difference]: Start difference. First operand 181 states and 212 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 19:46:05,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:05,126 INFO L93 Difference]: Finished difference Result 214 states and 256 transitions. [2021-05-02 19:46:05,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:46:05,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 103 [2021-05-02 19:46:05,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:05,128 INFO L225 Difference]: With dead ends: 214 [2021-05-02 19:46:05,128 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 19:46:05,129 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:46:05,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 19:46:05,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2021-05-02 19:46:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 134 states have (on average 1.1417910447761195) internal successors, (153), 136 states have internal predecessors, (153), 50 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 19:46:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 251 transitions. [2021-05-02 19:46:05,137 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 251 transitions. Word has length 103 [2021-05-02 19:46:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:05,137 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 251 transitions. [2021-05-02 19:46:05,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 19:46:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 251 transitions. [2021-05-02 19:46:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 19:46:05,138 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:05,138 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 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] [2021-05-02 19:46:05,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 19:46:05,354 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:05,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:05,354 INFO L82 PathProgramCache]: Analyzing trace with hash 2014256518, now seen corresponding path program 3 times [2021-05-02 19:46:05,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:05,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117633028] [2021-05-02 19:46:05,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:05,365 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:05,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830629931] [2021-05-02 19:46:05,365 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 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 19:46:05,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 19:46:05,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:05,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 19:46:05,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:05,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 86 proven. 36 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-05-02 19:46:05,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:05,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117633028] [2021-05-02 19:46:05,671 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:05,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830629931] [2021-05-02 19:46:05,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830629931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:05,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:05,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 19:46:05,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480559963] [2021-05-02 19:46:05,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 19:46:05,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:05,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 19:46:05,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:46:05,673 INFO L87 Difference]: Start difference. First operand 210 states and 251 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 19:46:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:12,136 INFO L93 Difference]: Finished difference Result 252 states and 298 transitions. [2021-05-02 19:46:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 19:46:12,137 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 106 [2021-05-02 19:46:12,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:12,138 INFO L225 Difference]: With dead ends: 252 [2021-05-02 19:46:12,138 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 19:46:12,138 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:46:12,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 19:46:12,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 235. [2021-05-02 19:46:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.105263157894737) internal successors, (168), 155 states have internal predecessors, (168), 52 states have call successors, (52), 31 states have call predecessors, (52), 30 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 19:46:12,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 270 transitions. [2021-05-02 19:46:12,144 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 270 transitions. Word has length 106 [2021-05-02 19:46:12,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:12,144 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 270 transitions. [2021-05-02 19:46:12,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 19:46:12,144 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 270 transitions. [2021-05-02 19:46:12,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 19:46:12,145 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:12,145 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 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] [2021-05-02 19:46:12,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 19:46:12,346 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:12,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:12,346 INFO L82 PathProgramCache]: Analyzing trace with hash 46832061, now seen corresponding path program 2 times [2021-05-02 19:46:12,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:12,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437131243] [2021-05-02 19:46:12,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:12,351 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:12,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895951921] [2021-05-02 19:46:12,351 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 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 19:46:12,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:46:12,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:12,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 19:46:12,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:12,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 102 proven. 18 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-05-02 19:46:12,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:12,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437131243] [2021-05-02 19:46:12,622 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:12,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895951921] [2021-05-02 19:46:12,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895951921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:12,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:12,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:46:12,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944332715] [2021-05-02 19:46:12,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:46:12,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:12,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:46:12,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:46:12,625 INFO L87 Difference]: Start difference. First operand 235 states and 270 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 19:46:12,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:12,735 INFO L93 Difference]: Finished difference Result 275 states and 331 transitions. [2021-05-02 19:46:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:46:12,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 114 [2021-05-02 19:46:12,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:12,739 INFO L225 Difference]: With dead ends: 275 [2021-05-02 19:46:12,739 INFO L226 Difference]: Without dead ends: 247 [2021-05-02 19:46:12,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:46:12,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-02 19:46:12,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 227. [2021-05-02 19:46:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 146 states have (on average 1.13013698630137) internal successors, (165), 150 states have internal predecessors, (165), 54 states have call successors, (54), 27 states have call predecessors, (54), 26 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 19:46:12,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 271 transitions. [2021-05-02 19:46:12,744 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 271 transitions. Word has length 114 [2021-05-02 19:46:12,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:12,745 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 271 transitions. [2021-05-02 19:46:12,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 19:46:12,745 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 271 transitions. [2021-05-02 19:46:12,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 19:46:12,746 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:12,746 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 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] [2021-05-02 19:46:12,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:12,966 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:12,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:12,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1109340483, now seen corresponding path program 3 times [2021-05-02 19:46:12,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:12,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422643420] [2021-05-02 19:46:12,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:12,971 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:12,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208091216] [2021-05-02 19:46:12,971 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 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 19:46:13,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:46:13,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:13,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 19:46:13,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:13,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:13,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:13,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:13,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 106 proven. 18 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-05-02 19:46:13,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:13,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422643420] [2021-05-02 19:46:13,186 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:13,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208091216] [2021-05-02 19:46:13,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208091216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:13,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:13,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:46:13,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582522301] [2021-05-02 19:46:13,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:46:13,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:13,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:46:13,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:46:13,187 INFO L87 Difference]: Start difference. First operand 227 states and 271 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 19:46:15,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:15,430 INFO L93 Difference]: Finished difference Result 236 states and 281 transitions. [2021-05-02 19:46:15,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:46:15,431 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 114 [2021-05-02 19:46:15,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:15,431 INFO L225 Difference]: With dead ends: 236 [2021-05-02 19:46:15,431 INFO L226 Difference]: Without dead ends: 227 [2021-05-02 19:46:15,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:46:15,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-02 19:46:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2021-05-02 19:46:15,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 143 states have (on average 1.118881118881119) internal successors, (160), 147 states have internal predecessors, (160), 54 states have call successors, (54), 28 states have call predecessors, (54), 27 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 19:46:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 265 transitions. [2021-05-02 19:46:15,436 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 265 transitions. Word has length 114 [2021-05-02 19:46:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:15,437 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 265 transitions. [2021-05-02 19:46:15,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 19:46:15,437 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 265 transitions. [2021-05-02 19:46:15,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 19:46:15,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:15,437 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:15,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:15,652 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:15,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1953340215, now seen corresponding path program 4 times [2021-05-02 19:46:15,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:15,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612459214] [2021-05-02 19:46:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:15,658 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:15,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130936746] [2021-05-02 19:46:15,658 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 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 19:46:15,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:46:15,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:15,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 19:46:15,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:15,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 45 proven. 81 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 19:46:16,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:16,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612459214] [2021-05-02 19:46:16,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:16,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130936746] [2021-05-02 19:46:16,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130936746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:16,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:16,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 19:46:16,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452729565] [2021-05-02 19:46:16,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 19:46:16,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:16,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 19:46:16,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-02 19:46:16,116 INFO L87 Difference]: Start difference. First operand 225 states and 265 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 19:46:16,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:16,536 INFO L93 Difference]: Finished difference Result 287 states and 345 transitions. [2021-05-02 19:46:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 19:46:16,536 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 122 [2021-05-02 19:46:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:16,537 INFO L225 Difference]: With dead ends: 287 [2021-05-02 19:46:16,537 INFO L226 Difference]: Without dead ends: 282 [2021-05-02 19:46:16,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:46:16,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-02 19:46:16,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 277. [2021-05-02 19:46:16,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 174 states have (on average 1.132183908045977) internal successors, (197), 178 states have internal predecessors, (197), 70 states have call successors, (70), 33 states have call predecessors, (70), 32 states have return successors, (67), 65 states have call predecessors, (67), 67 states have call successors, (67) [2021-05-02 19:46:16,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 334 transitions. [2021-05-02 19:46:16,543 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 334 transitions. Word has length 122 [2021-05-02 19:46:16,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:16,543 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 334 transitions. [2021-05-02 19:46:16,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 19:46:16,543 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 334 transitions. [2021-05-02 19:46:16,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 19:46:16,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:16,544 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:16,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 19:46:16,760 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:16,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:16,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1409290752, now seen corresponding path program 3 times [2021-05-02 19:46:16,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:16,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561697369] [2021-05-02 19:46:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:16,775 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:16,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1462131842] [2021-05-02 19:46:16,775 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 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 19:46:16,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 19:46:16,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:16,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:46:16,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:19,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:19,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 100 proven. 12 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2021-05-02 19:46:19,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:19,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561697369] [2021-05-02 19:46:19,047 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:19,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462131842] [2021-05-02 19:46:19,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462131842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:19,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:19,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:46:19,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004605069] [2021-05-02 19:46:19,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:46:19,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:19,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:46:19,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2021-05-02 19:46:19,048 INFO L87 Difference]: Start difference. First operand 277 states and 334 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 19:46:25,144 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 19:46:53,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:53,562 INFO L93 Difference]: Finished difference Result 309 states and 381 transitions. [2021-05-02 19:46:53,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:46:53,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2021-05-02 19:46:53,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:53,563 INFO L225 Difference]: With dead ends: 309 [2021-05-02 19:46:53,563 INFO L226 Difference]: Without dead ends: 304 [2021-05-02 19:46:53,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8168.8ms TimeCoverageRelationStatistics Valid=40, Invalid=114, Unknown=2, NotChecked=0, Total=156 [2021-05-02 19:46:53,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-02 19:46:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 234. [2021-05-02 19:46:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 149 states have (on average 1.1073825503355705) internal successors, (165), 154 states have internal predecessors, (165), 55 states have call successors, (55), 30 states have call predecessors, (55), 29 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 19:46:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2021-05-02 19:46:53,571 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 130 [2021-05-02 19:46:53,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:53,571 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2021-05-02 19:46:53,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 19:46:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2021-05-02 19:46:53,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 19:46:53,572 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:53,572 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-05-02 19:46:53,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 19:46:53,785 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:53,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:53,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1769981228, now seen corresponding path program 4 times [2021-05-02 19:46:53,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:53,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491905833] [2021-05-02 19:46:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:53,790 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:53,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256692003] [2021-05-02 19:46:53,790 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 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 19:46:53,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:46:53,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:53,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 19:46:53,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:53,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:53,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 49 proven. 103 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-05-02 19:46:54,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:54,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491905833] [2021-05-02 19:46:54,362 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:54,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256692003] [2021-05-02 19:46:54,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256692003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:54,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:54,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 19:46:54,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033038065] [2021-05-02 19:46:54,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 19:46:54,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:54,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 19:46:54,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-02 19:46:54,364 INFO L87 Difference]: Start difference. First operand 234 states and 272 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 19:46:54,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:54,913 INFO L93 Difference]: Finished difference Result 288 states and 334 transitions. [2021-05-02 19:46:54,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 19:46:54,914 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) Word has length 138 [2021-05-02 19:46:54,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:54,915 INFO L225 Difference]: With dead ends: 288 [2021-05-02 19:46:54,915 INFO L226 Difference]: Without dead ends: 274 [2021-05-02 19:46:54,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 298.3ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-02 19:46:54,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-02 19:46:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2021-05-02 19:46:54,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 174 states have (on average 1.0977011494252873) internal successors, (191), 179 states have internal predecessors, (191), 61 states have call successors, (61), 35 states have call predecessors, (61), 34 states have return successors, (58), 55 states have call predecessors, (58), 58 states have call successors, (58) [2021-05-02 19:46:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 310 transitions. [2021-05-02 19:46:54,920 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 310 transitions. Word has length 138 [2021-05-02 19:46:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:54,920 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 310 transitions. [2021-05-02 19:46:54,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 19:46:54,920 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 310 transitions. [2021-05-02 19:46:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 19:46:54,921 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:54,922 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:55,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:55,133 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:55,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:55,133 INFO L82 PathProgramCache]: Analyzing trace with hash -493605665, now seen corresponding path program 5 times [2021-05-02 19:46:55,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:55,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692537162] [2021-05-02 19:46:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:55,140 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:55,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516936222] [2021-05-02 19:46:55,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:46:55,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-02 19:46:55,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:55,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 19:46:55,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:55,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 481 proven. 1 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-05-02 19:46:55,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:55,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692537162] [2021-05-02 19:46:55,387 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:55,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516936222] [2021-05-02 19:46:55,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516936222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:55,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:55,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:46:55,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698485712] [2021-05-02 19:46:55,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:46:55,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:55,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:46:55,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:46:55,388 INFO L87 Difference]: Start difference. First operand 270 states and 310 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 19:46:55,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:55,422 INFO L93 Difference]: Finished difference Result 268 states and 297 transitions. [2021-05-02 19:46:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:46:55,422 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 154 [2021-05-02 19:46:55,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:55,423 INFO L225 Difference]: With dead ends: 268 [2021-05-02 19:46:55,423 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 19:46:55,424 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:46:55,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 19:46:55,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2021-05-02 19:46:55,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 124 states have (on average 1.0725806451612903) internal successors, (133), 129 states have internal predecessors, (133), 43 states have call successors, (43), 27 states have call predecessors, (43), 25 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 19:46:55,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 214 transitions. [2021-05-02 19:46:55,428 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 214 transitions. Word has length 154 [2021-05-02 19:46:55,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:55,428 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 214 transitions. [2021-05-02 19:46:55,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 19:46:55,428 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 214 transitions. [2021-05-02 19:46:55,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 19:46:55,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:55,429 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2021-05-02 19:46:55,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 19:46:55,644 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:55,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:55,645 INFO L82 PathProgramCache]: Analyzing trace with hash -604387605, now seen corresponding path program 6 times [2021-05-02 19:46:55,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:55,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814103820] [2021-05-02 19:46:55,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:55,653 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:55,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777762381] [2021-05-02 19:46:55,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 19:46:55,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 19:46:55,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:55,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 19:46:55,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:55,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 51 proven. 983 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-05-02 19:46:55,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:55,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814103820] [2021-05-02 19:46:55,970 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:55,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777762381] [2021-05-02 19:46:55,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777762381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:55,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:55,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:46:55,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967984359] [2021-05-02 19:46:55,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:46:55,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:55,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:46:55,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:46:55,971 INFO L87 Difference]: Start difference. First operand 193 states and 214 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 10 states have call successors, (27), 10 states have call predecessors, (27), 8 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-02 19:46:56,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:56,154 INFO L93 Difference]: Finished difference Result 294 states and 324 transitions. [2021-05-02 19:46:56,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 19:46:56,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 10 states have call successors, (27), 10 states have call predecessors, (27), 8 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) Word has length 162 [2021-05-02 19:46:56,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:56,156 INFO L225 Difference]: With dead ends: 294 [2021-05-02 19:46:56,156 INFO L226 Difference]: Without dead ends: 294 [2021-05-02 19:46:56,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:46:56,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-02 19:46:56,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 286. [2021-05-02 19:46:56,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 185 states have (on average 1.0648648648648649) internal successors, (197), 191 states have internal predecessors, (197), 62 states have call successors, (62), 40 states have call predecessors, (62), 38 states have return successors, (57), 54 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 19:46:56,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 316 transitions. [2021-05-02 19:46:56,161 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 316 transitions. Word has length 162 [2021-05-02 19:46:56,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:56,161 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 316 transitions. [2021-05-02 19:46:56,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 10 states have call successors, (27), 10 states have call predecessors, (27), 8 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-02 19:46:56,161 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 316 transitions. [2021-05-02 19:46:56,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-02 19:46:56,162 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:56,162 INFO L523 BasicCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 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] [2021-05-02 19:46:56,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:56,378 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:56,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:56,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1937088971, now seen corresponding path program 5 times [2021-05-02 19:46:56,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:56,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107402305] [2021-05-02 19:46:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:56,386 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:56,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990012997] [2021-05-02 19:46:56,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:46:56,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-02 19:46:56,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:56,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:46:56,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:56,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 52 proven. 1284 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-02 19:46:56,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:56,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107402305] [2021-05-02 19:46:56,753 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:56,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990012997] [2021-05-02 19:46:56,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990012997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:56,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:56,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:46:56,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957923486] [2021-05-02 19:46:56,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:46:56,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:56,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:46:56,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:46:56,757 INFO L87 Difference]: Start difference. First operand 286 states and 316 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 11 states have call successors, (30), 11 states have call predecessors, (30), 9 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 19:46:56,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:56,960 INFO L93 Difference]: Finished difference Result 350 states and 390 transitions. [2021-05-02 19:46:56,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:46:56,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 11 states have call successors, (30), 11 states have call predecessors, (30), 9 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) Word has length 178 [2021-05-02 19:46:56,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:56,962 INFO L225 Difference]: With dead ends: 350 [2021-05-02 19:46:56,962 INFO L226 Difference]: Without dead ends: 350 [2021-05-02 19:46:56,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:46:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-02 19:46:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 339. [2021-05-02 19:46:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 218 states have (on average 1.0642201834862386) internal successors, (232), 226 states have internal predecessors, (232), 76 states have call successors, (76), 46 states have call predecessors, (76), 44 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 19:46:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 379 transitions. [2021-05-02 19:46:56,969 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 379 transitions. Word has length 178 [2021-05-02 19:46:56,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:56,969 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 379 transitions. [2021-05-02 19:46:56,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 11 states have call successors, (30), 11 states have call predecessors, (30), 9 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 19:46:56,969 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 379 transitions. [2021-05-02 19:46:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-05-02 19:46:56,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:56,970 INFO L523 BasicCegarLoop]: trace histogram [28, 27, 27, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:57,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 19:46:57,186 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:57,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:57,186 INFO L82 PathProgramCache]: Analyzing trace with hash 846162435, now seen corresponding path program 3 times [2021-05-02 19:46:57,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:57,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299061624] [2021-05-02 19:46:57,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:57,200 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:57,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514434967] [2021-05-02 19:46:57,200 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 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 19:46:57,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 19:46:57,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:57,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 19:46:57,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:57,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 243 proven. 94 refuted. 0 times theorem prover too weak. 1237 trivial. 0 not checked. [2021-05-02 19:46:57,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:57,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299061624] [2021-05-02 19:46:57,550 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:57,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514434967] [2021-05-02 19:46:57,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514434967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:57,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:57,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:46:57,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241551147] [2021-05-02 19:46:57,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:46:57,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:57,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:46:57,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:46:57,551 INFO L87 Difference]: Start difference. First operand 339 states and 379 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-02 19:47:05,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:47:05,801 INFO L93 Difference]: Finished difference Result 346 states and 384 transitions. [2021-05-02 19:47:05,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:47:05,802 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), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) Word has length 183 [2021-05-02 19:47:05,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:47:05,803 INFO L225 Difference]: With dead ends: 346 [2021-05-02 19:47:05,803 INFO L226 Difference]: Without dead ends: 331 [2021-05-02 19:47:05,803 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:47:05,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-02 19:47:05,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2021-05-02 19:47:05,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 209 states have (on average 1.0478468899521531) internal successors, (219), 214 states have internal predecessors, (219), 71 states have call successors, (71), 45 states have call predecessors, (71), 43 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 19:47:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 359 transitions. [2021-05-02 19:47:05,808 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 359 transitions. Word has length 183 [2021-05-02 19:47:05,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:47:05,809 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 359 transitions. [2021-05-02 19:47:05,809 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), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-02 19:47:05,809 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 359 transitions. [2021-05-02 19:47:05,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-02 19:47:05,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:47:05,810 INFO L523 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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] [2021-05-02 19:47:06,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 19:47:06,021 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:47:06,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:47:06,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2011105538, now seen corresponding path program 7 times [2021-05-02 19:47:06,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:47:06,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498505095] [2021-05-02 19:47:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:47:06,026 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:47:06,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669022085] [2021-05-02 19:47:06,027 INFO L93 rtionOrderModulation]: Changing assertion order to 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 19:47:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:47:06,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:47:06,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:47:06,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 59 proven. 1391 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-05-02 19:47:06,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:47:06,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498505095] [2021-05-02 19:47:06,370 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:47:06,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669022085] [2021-05-02 19:47:06,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669022085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:47:06,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:47:06,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:47:06,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449860598] [2021-05-02 19:47:06,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:47:06,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:47:06,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:47:06,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:47:06,371 INFO L87 Difference]: Start difference. First operand 324 states and 359 transitions. Second operand has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 11 states have call successors, (31), 11 states have call predecessors, (31), 9 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) [2021-05-02 19:47:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:47:06,606 INFO L93 Difference]: Finished difference Result 338 states and 373 transitions. [2021-05-02 19:47:06,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 19:47:06,606 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 11 states have call successors, (31), 11 states have call predecessors, (31), 9 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) Word has length 186 [2021-05-02 19:47:06,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:47:06,607 INFO L225 Difference]: With dead ends: 338 [2021-05-02 19:47:06,608 INFO L226 Difference]: Without dead ends: 338 [2021-05-02 19:47:06,608 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:47:06,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-02 19:47:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 330. [2021-05-02 19:47:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 215 states have (on average 1.0465116279069768) internal successors, (225), 218 states have internal predecessors, (225), 71 states have call successors, (71), 45 states have call predecessors, (71), 43 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 19:47:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 365 transitions. [2021-05-02 19:47:06,613 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 365 transitions. Word has length 186 [2021-05-02 19:47:06,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:47:06,613 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 365 transitions. [2021-05-02 19:47:06,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 11 states have call successors, (31), 11 states have call predecessors, (31), 9 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) [2021-05-02 19:47:06,614 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 365 transitions. [2021-05-02 19:47:06,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-02 19:47:06,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:47:06,615 INFO L523 BasicCegarLoop]: trace histogram [31, 30, 30, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 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] [2021-05-02 19:47:06,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 19:47:06,831 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:47:06,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:47:06,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1344678430, now seen corresponding path program 6 times [2021-05-02 19:47:06,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:47:06,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027525143] [2021-05-02 19:47:06,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:47:06,838 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:47:06,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698681213] [2021-05-02 19:47:06,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 19:47:06,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-02 19:47:06,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:47:06,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 19:47:06,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:47:06,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:06,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:07,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:07,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:07,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:07,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:07,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:07,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 287 proven. 191 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2021-05-02 19:47:07,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:47:07,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027525143] [2021-05-02 19:47:07,251 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:47:07,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698681213] [2021-05-02 19:47:07,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698681213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:47:07,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:47:07,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:47:07,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462082643] [2021-05-02 19:47:07,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:47:07,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:47:07,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:47:07,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:47:07,252 INFO L87 Difference]: Start difference. First operand 330 states and 365 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-02 19:47:13,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:47:13,523 INFO L93 Difference]: Finished difference Result 353 states and 383 transitions. [2021-05-02 19:47:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:47:13,523 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) Word has length 202 [2021-05-02 19:47:13,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:47:13,524 INFO L225 Difference]: With dead ends: 353 [2021-05-02 19:47:13,524 INFO L226 Difference]: Without dead ends: 347 [2021-05-02 19:47:13,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:47:13,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-02 19:47:13,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 346. [2021-05-02 19:47:13,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 227 states have (on average 1.0352422907488987) internal successors, (235), 230 states have internal predecessors, (235), 71 states have call successors, (71), 49 states have call predecessors, (71), 47 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 19:47:13,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 375 transitions. [2021-05-02 19:47:13,529 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 375 transitions. Word has length 202 [2021-05-02 19:47:13,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:47:13,530 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 375 transitions. [2021-05-02 19:47:13,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-02 19:47:13,530 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 375 transitions. [2021-05-02 19:47:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 19:47:13,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:47:13,531 INFO L523 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 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] [2021-05-02 19:47:13,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 19:47:13,740 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:47:13,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:47:13,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1224029721, now seen corresponding path program 8 times [2021-05-02 19:47:13,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:47:13,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277733] [2021-05-02 19:47:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:47:13,746 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:47:13,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419316354] [2021-05-02 19:47:13,746 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 19:47:13,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:47:13,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:47:13,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 19:47:13,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:47:13,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:13,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 214 proven. 146 refuted. 0 times theorem prover too weak. 1742 trivial. 0 not checked. [2021-05-02 19:47:14,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:47:14,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277733] [2021-05-02 19:47:14,346 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:47:14,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419316354] [2021-05-02 19:47:14,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419316354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:47:14,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:47:14,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:47:14,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779756344] [2021-05-02 19:47:14,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:47:14,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:47:14,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:47:14,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:47:14,347 INFO L87 Difference]: Start difference. First operand 346 states and 375 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2021-05-02 19:47:14,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:47:14,855 INFO L93 Difference]: Finished difference Result 424 states and 485 transitions. [2021-05-02 19:47:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 19:47:14,856 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) Word has length 210 [2021-05-02 19:47:14,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:47:14,857 INFO L225 Difference]: With dead ends: 424 [2021-05-02 19:47:14,857 INFO L226 Difference]: Without dead ends: 424 [2021-05-02 19:47:14,857 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:47:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-05-02 19:47:14,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 390. [2021-05-02 19:47:14,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 250 states have (on average 1.056) internal successors, (264), 253 states have internal predecessors, (264), 92 states have call successors, (92), 49 states have call predecessors, (92), 47 states have return successors, (90), 87 states have call predecessors, (90), 90 states have call successors, (90) [2021-05-02 19:47:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 446 transitions. [2021-05-02 19:47:14,864 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 446 transitions. Word has length 210 [2021-05-02 19:47:14,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:47:14,864 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 446 transitions. [2021-05-02 19:47:14,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2021-05-02 19:47:14,864 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 446 transitions. [2021-05-02 19:47:14,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 19:47:14,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:47:14,865 INFO L523 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 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] [2021-05-02 19:47:15,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:47:15,081 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:47:15,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:47:15,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1125291239, now seen corresponding path program 9 times [2021-05-02 19:47:15,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:47:15,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073107136] [2021-05-02 19:47:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:47:15,088 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:47:15,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241932975] [2021-05-02 19:47:15,088 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 19:47:15,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 19:47:15,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:47:15,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 19:47:15,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:47:15,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:15,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:24,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:24,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:24,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:26,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 358 proven. 157 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2021-05-02 19:47:28,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:47:28,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073107136] [2021-05-02 19:47:28,520 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:47:28,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241932975] [2021-05-02 19:47:28,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241932975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:47:28,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:47:28,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 19:47:28,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045793504] [2021-05-02 19:47:28,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 19:47:28,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:47:28,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 19:47:28,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=121, Unknown=4, NotChecked=0, Total=156 [2021-05-02 19:47:28,521 INFO L87 Difference]: Start difference. First operand 390 states and 446 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 19:47:54,907 WARN L205 SmtUtils]: Spent 8.07 s on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-05-02 19:49:08,865 WARN L205 SmtUtils]: Spent 37.43 s on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-05-02 19:49:48,106 WARN L205 SmtUtils]: Spent 32.31 s on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-02 19:50:30,598 WARN L205 SmtUtils]: Spent 34.34 s on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-02 19:51:27,350 WARN L205 SmtUtils]: Spent 40.48 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-02 19:51:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:51:43,386 INFO L93 Difference]: Finished difference Result 522 states and 647 transitions. [2021-05-02 19:51:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:51:43,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 210 [2021-05-02 19:51:43,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:51:43,390 INFO L225 Difference]: With dead ends: 522 [2021-05-02 19:51:43,390 INFO L226 Difference]: Without dead ends: 516 [2021-05-02 19:51:43,390 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 199020.9ms TimeCoverageRelationStatistics Valid=117, Invalid=413, Unknown=22, NotChecked=0, Total=552 [2021-05-02 19:51:43,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-05-02 19:51:43,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 436. [2021-05-02 19:51:43,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 273 states have (on average 1.0622710622710623) internal successors, (290), 277 states have internal predecessors, (290), 113 states have call successors, (113), 51 states have call predecessors, (113), 49 states have return successors, (111), 107 states have call predecessors, (111), 111 states have call successors, (111) [2021-05-02 19:51:43,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 514 transitions. [2021-05-02 19:51:43,400 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 514 transitions. Word has length 210 [2021-05-02 19:51:43,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:51:43,400 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 514 transitions. [2021-05-02 19:51:43,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 19:51:43,401 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 514 transitions. [2021-05-02 19:51:43,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-02 19:51:43,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:51:43,402 INFO L523 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:51:43,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:51:43,617 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:51:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:51:43,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1541434116, now seen corresponding path program 10 times [2021-05-02 19:51:43,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:51:43,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597294868] [2021-05-02 19:51:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:51:43,626 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:51:43,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972345119] [2021-05-02 19:51:43,626 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 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 19:51:43,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:51:43,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:51:43,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 19:51:43,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:51:43,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:43,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:43,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:43,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:43,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:43,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:43,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:43,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:43,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:43,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:43,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:43,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:43,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:43,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:44,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:45,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:45,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:45,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:45,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 83 proven. 332 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2021-05-02 19:51:45,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:51:45,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597294868] [2021-05-02 19:51:45,199 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:51:45,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972345119] [2021-05-02 19:51:45,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972345119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:51:45,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:51:45,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-02 19:51:45,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137616596] [2021-05-02 19:51:45,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 19:51:45,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:51:45,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 19:51:45,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-05-02 19:51:45,200 INFO L87 Difference]: Start difference. First operand 436 states and 514 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) [2021-05-02 19:51:47,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:51:47,061 INFO L93 Difference]: Finished difference Result 500 states and 578 transitions. [2021-05-02 19:51:47,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 19:51:47,062 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) Word has length 242 [2021-05-02 19:51:47,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:51:47,063 INFO L225 Difference]: With dead ends: 500 [2021-05-02 19:51:47,063 INFO L226 Difference]: Without dead ends: 394 [2021-05-02 19:51:47,064 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 842.4ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-05-02 19:51:47,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-02 19:51:47,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2021-05-02 19:51:47,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 247 states have (on average 1.0647773279352226) internal successors, (263), 250 states have internal predecessors, (263), 101 states have call successors, (101), 47 states have call predecessors, (101), 45 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-02 19:51:47,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 463 transitions. [2021-05-02 19:51:47,071 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 463 transitions. Word has length 242 [2021-05-02 19:51:47,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:51:47,071 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 463 transitions. [2021-05-02 19:51:47,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) [2021-05-02 19:51:47,072 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 463 transitions. [2021-05-02 19:51:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-02 19:51:47,073 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:51:47,073 INFO L523 BasicCegarLoop]: trace histogram [41, 40, 40, 10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:51:47,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 19:51:47,289 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:51:47,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:51:47,290 INFO L82 PathProgramCache]: Analyzing trace with hash 716020763, now seen corresponding path program 11 times [2021-05-02 19:51:47,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:51:47,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725912180] [2021-05-02 19:51:47,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:51:47,298 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:51:47,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254320438] [2021-05-02 19:51:47,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:51:47,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 19:51:47,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:51:47,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 19:51:47,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:51:47,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:47,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:48,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:48,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:51:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3500 backedges. 88 proven. 3208 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-05-02 19:51:48,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:51:48,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725912180] [2021-05-02 19:51:48,047 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:51:48,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254320438] [2021-05-02 19:51:48,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254320438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:51:48,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:51:48,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:51:48,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683641132] [2021-05-02 19:51:48,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:51:48,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:51:48,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:51:48,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:51:48,049 INFO L87 Difference]: Start difference. First operand 394 states and 463 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (44), 15 states have call predecessors, (44), 13 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) [2021-05-02 19:51:48,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:51:48,769 INFO L93 Difference]: Finished difference Result 741 states and 877 transitions. [2021-05-02 19:51:48,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 19:51:48,770 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (44), 15 states have call predecessors, (44), 13 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) Word has length 266 [2021-05-02 19:51:48,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:51:48,772 INFO L225 Difference]: With dead ends: 741 [2021-05-02 19:51:48,772 INFO L226 Difference]: Without dead ends: 741 [2021-05-02 19:51:48,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=261, Invalid=441, Unknown=0, NotChecked=0, Total=702 [2021-05-02 19:51:48,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-05-02 19:51:48,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 705. [2021-05-02 19:51:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 440 states have (on average 1.059090909090909) internal successors, (466), 448 states have internal predecessors, (466), 188 states have call successors, (188), 78 states have call predecessors, (188), 76 states have return successors, (186), 178 states have call predecessors, (186), 186 states have call successors, (186) [2021-05-02 19:51:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 840 transitions. [2021-05-02 19:51:48,783 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 840 transitions. Word has length 266 [2021-05-02 19:51:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:51:48,783 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 840 transitions. [2021-05-02 19:51:48,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (44), 15 states have call predecessors, (44), 13 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) [2021-05-02 19:51:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 840 transitions. [2021-05-02 19:51:48,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-05-02 19:51:48,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:51:48,785 INFO L523 BasicCegarLoop]: trace histogram [45, 44, 44, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:51:49,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 19:51:49,001 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:51:49,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:51:49,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1766699470, now seen corresponding path program 12 times [2021-05-02 19:51:49,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:51:49,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302295466] [2021-05-02 19:51:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:51:49,006 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:51:49,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753605917] [2021-05-02 19:51:49,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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