/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_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:43:50,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:43:50,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:43:50,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:43:50,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:43:50,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:43:50,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:43:50,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:43:50,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:43:50,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:43:50,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:43:50,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:43:50,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:43:50,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:43:50,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:43:50,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:43:50,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:43:50,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:43:50,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:43:50,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:43:50,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:43:50,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:43:50,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:43:50,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:43:50,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:43:50,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:43:50,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:43:50,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:43:50,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:43:50,094 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:43:50,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:43:50,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:43:50,095 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:43:50,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:43:50,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:43:50,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:43:50,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:43:50,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:43:50,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:43:50,097 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:43:50,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:43:50,097 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:43:50,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:43:50,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:43:50,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:43:50,098 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:43:50,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:43:50,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:43:50,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:43:50,099 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:43:50,100 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:43:50,100 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:43:50,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:43:50,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:43:50,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:43:50,425 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:43:50,426 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:43:50,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2021-05-02 19:43:50,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1758ef1d0/ff5311aff6bf46d9b2cd14c13a445af4/FLAG6e9e346ea [2021-05-02 19:43:50,940 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:43:50,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2021-05-02 19:43:50,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1758ef1d0/ff5311aff6bf46d9b2cd14c13a445af4/FLAG6e9e346ea [2021-05-02 19:43:50,979 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1758ef1d0/ff5311aff6bf46d9b2cd14c13a445af4 [2021-05-02 19:43:50,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:43:50,989 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:43:50,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:43:50,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:43:50,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:43:50,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:43:50" (1/1) ... [2021-05-02 19:43:50,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fc2bfb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:43:50, skipping insertion in model container [2021-05-02 19:43:50,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:43:50" (1/1) ... [2021-05-02 19:43:51,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:43:51,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:43:51,178 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_unwindbound20.c[576,589] [2021-05-02 19:43:51,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:43:51,197 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:43:51,208 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_unwindbound20.c[576,589] [2021-05-02 19:43:51,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:43:51,225 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:43:51,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:43:51 WrapperNode [2021-05-02 19:43:51,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:43:51,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:43:51,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:43:51,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:43:51,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:43:51" (1/1) ... [2021-05-02 19:43:51,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:43:51" (1/1) ... [2021-05-02 19:43:51,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:43:51" (1/1) ... [2021-05-02 19:43:51,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:43:51" (1/1) ... [2021-05-02 19:43:51,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:43:51" (1/1) ... [2021-05-02 19:43:51,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:43:51" (1/1) ... [2021-05-02 19:43:51,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:43:51" (1/1) ... [2021-05-02 19:43:51,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:43:51,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:43:51,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:43:51,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:43:51,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:43:51" (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 19:43:51,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:43:51,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:43:51,383 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:43:51,383 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:43:51,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:43:51,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:43:51,384 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:43:51,384 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:43:51,384 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:43:51,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:43:51,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:43:51,385 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:43:51,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:43:51,385 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:43:51,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:43:51,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:43:51,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:43:51,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:43:51,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:43:51,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:43:51,678 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:43:51,678 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 19:43:51,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:43:51 BoogieIcfgContainer [2021-05-02 19:43:51,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:43:51,680 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:43:51,680 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:43:51,681 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:43:51,683 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:43:51" (1/1) ... [2021-05-02 19:43:51,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:43:51 BasicIcfg [2021-05-02 19:43:51,699 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:43:51,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:43:51,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:43:51,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:43:51,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:43:50" (1/4) ... [2021-05-02 19:43:51,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114788a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:43:51, skipping insertion in model container [2021-05-02 19:43:51,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:43:51" (2/4) ... [2021-05-02 19:43:51,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114788a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:43:51, skipping insertion in model container [2021-05-02 19:43:51,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:43:51" (3/4) ... [2021-05-02 19:43:51,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114788a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:43:51, skipping insertion in model container [2021-05-02 19:43:51,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:43:51" (4/4) ... [2021-05-02 19:43:51,718 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound20.cJordan [2021-05-02 19:43:51,724 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:43:51,727 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:43:51,742 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:43:51,766 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:43:51,766 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:43:51,766 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:43:51,767 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:43:51,767 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:43:51,767 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:43:51,767 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:43:51,767 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:43:51,781 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 19:43:51,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 19:43:51,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:51,792 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 19:43:51,793 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:51,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:51,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2021-05-02 19:43:51,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:51,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321880638] [2021-05-02 19:43:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:43:51,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:43:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:43:51,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:43:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:43:51,992 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 19:43:51,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:43:51,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321880638] [2021-05-02 19:43:51,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321880638] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:43:51,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:43:51,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:43:51,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809041157] [2021-05-02 19:43:51,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:43:51,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:43:52,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:43:52,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:43:52,011 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 19:43:52,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:52,119 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-02 19:43:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:43:52,121 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 19:43:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:52,127 INFO L225 Difference]: With dead ends: 39 [2021-05-02 19:43:52,127 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 19:43:52,128 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:43:52,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 19:43:52,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 19:43:52,155 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 19:43:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-02 19:43:52,158 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-05-02 19:43:52,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:52,158 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-02 19:43:52,158 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 19:43:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-02 19:43:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 19:43:52,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:52,159 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 19:43:52,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:43:52,160 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:52,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2021-05-02 19:43:52,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:52,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553754926] [2021-05-02 19:43:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:52,178 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:43:52,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481554946] [2021-05-02 19:43:52,179 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 19:43:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:43:52,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 19:43:52,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:43:52,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:52,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:52,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:52,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:52,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:52,358 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 19:43:52,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:43:52,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553754926] [2021-05-02 19:43:52,359 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:43:52,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481554946] [2021-05-02 19:43:52,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481554946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:43:52,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:43:52,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:43:52,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897525431] [2021-05-02 19:43:52,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 19:43:52,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:43:52,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 19:43:52,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:43:52,362 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 19:43:52,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:52,377 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-02 19:43:52,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 19:43:52,377 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 19:43:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:52,378 INFO L225 Difference]: With dead ends: 35 [2021-05-02 19:43:52,378 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 19:43:52,379 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:43:52,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 19:43:52,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 19:43:52,383 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 19:43:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 19:43:52,385 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-05-02 19:43:52,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:52,385 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 19:43:52,385 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 19:43:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 19:43:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 19:43:52,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:52,386 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 19:43:52,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:43:52,593 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:52,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:52,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2021-05-02 19:43:52,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:52,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764303025] [2021-05-02 19:43:52,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:52,616 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:43:52,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983075795] [2021-05-02 19:43:52,617 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 19:43:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:43:52,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:43:52,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:43:52,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:52,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:52,837 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 19:43:52,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:43:52,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764303025] [2021-05-02 19:43:52,838 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:43:52,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983075795] [2021-05-02 19:43:52,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983075795] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:43:52,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:43:52,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:43:52,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407249444] [2021-05-02 19:43:52,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:43:52,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:43:52,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:43:52,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:43:52,843 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 19:43:52,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:52,954 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-02 19:43:52,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:43:52,954 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 19:43:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:52,958 INFO L225 Difference]: With dead ends: 43 [2021-05-02 19:43:52,958 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 19:43:52,959 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:43:52,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 19:43:52,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 19:43:52,970 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 19:43:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 19:43:52,974 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2021-05-02 19:43:52,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:52,974 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 19:43:52,974 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 19:43:52,974 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 19:43:52,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 19:43:52,975 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:52,975 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 19:43:53,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:43:53,199 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:53,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:53,200 INFO L82 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2021-05-02 19:43:53,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:53,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587524919] [2021-05-02 19:43:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:53,212 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:43:53,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325905800] [2021-05-02 19:43:53,213 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 19:43:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:43:53,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:43:53,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:43:53,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:53,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:53,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:53,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:53,405 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 19:43:53,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:43:53,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587524919] [2021-05-02 19:43:53,406 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:43:53,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325905800] [2021-05-02 19:43:53,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325905800] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:43:53,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:43:53,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:43:53,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558743203] [2021-05-02 19:43:53,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:43:53,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:43:53,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:43:53,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:43:53,408 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 19:43:53,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:53,534 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-05-02 19:43:53,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:43:53,535 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 19:43:53,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:53,538 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:43:53,538 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 19:43:53,538 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:43:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 19:43:53,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 19:43:53,549 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 19:43:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-02 19:43:53,553 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2021-05-02 19:43:53,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:53,554 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-02 19:43:53,554 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 19:43:53,554 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-02 19:43:53,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 19:43:53,555 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:53,555 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 19:43:53,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:43:53,779 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:53,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:53,779 INFO L82 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2021-05-02 19:43:53,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:53,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370323488] [2021-05-02 19:43:53,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:53,795 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:43:53,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735540995] [2021-05-02 19:43:53,796 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 19:43:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:43:53,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:43:53,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:43:53,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:53,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:53,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:53,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:53,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:53,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:53,974 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 19:43:53,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:43:53,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370323488] [2021-05-02 19:43:53,974 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:43:53,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735540995] [2021-05-02 19:43:53,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735540995] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:43:53,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:43:53,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:43:53,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143862269] [2021-05-02 19:43:53,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:43:53,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:43:53,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:43:53,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:43:53,976 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 19:43:54,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:54,099 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2021-05-02 19:43:54,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:43:54,100 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 19:43:54,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:54,101 INFO L225 Difference]: With dead ends: 81 [2021-05-02 19:43:54,101 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 19:43:54,102 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:43:54,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 19:43:54,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-05-02 19:43:54,108 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 19:43:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-05-02 19:43:54,109 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2021-05-02 19:43:54,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:54,110 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-05-02 19:43:54,110 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 19:43:54,110 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-05-02 19:43:54,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 19:43:54,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:54,111 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 19:43:54,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:43:54,325 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:54,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:54,326 INFO L82 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2021-05-02 19:43:54,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:54,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749306185] [2021-05-02 19:43:54,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:54,349 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:43:54,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319291687] [2021-05-02 19:43:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:43:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:43:54,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:43:54,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:43:54,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,474 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 19:43:54,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:43:54,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749306185] [2021-05-02 19:43:54,475 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:43:54,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319291687] [2021-05-02 19:43:54,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319291687] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:43:54,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:43:54,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 19:43:54,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205800485] [2021-05-02 19:43:54,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:43:54,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:43:54,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:43:54,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:43:54,477 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 19:43:54,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:54,510 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2021-05-02 19:43:54,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 19:43:54,511 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 19:43:54,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:54,514 INFO L225 Difference]: With dead ends: 78 [2021-05-02 19:43:54,514 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 19:43:54,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:43:54,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 19:43:54,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 19:43:54,533 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 19:43:54,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-05-02 19:43:54,534 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2021-05-02 19:43:54,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:54,534 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-05-02 19:43:54,535 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 19:43:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-05-02 19:43:54,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 19:43:54,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:54,536 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 19:43:54,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 19:43:54,736 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:54,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:54,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1527688582, now seen corresponding path program 1 times [2021-05-02 19:43:54,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:54,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802973485] [2021-05-02 19:43:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:54,746 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:43:54,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123389393] [2021-05-02 19:43:54,746 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 19:43:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:43:54,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 19:43:54,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:43:54,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,977 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 19:43:54,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:43:54,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802973485] [2021-05-02 19:43:54,977 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:43:54,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123389393] [2021-05-02 19:43:54,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123389393] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:43:54,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:43:54,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:43:54,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810293599] [2021-05-02 19:43:54,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:43:54,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:43:54,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:43:54,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:43:54,981 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 19:43:55,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:55,071 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2021-05-02 19:43:55,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:43:55,072 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 19:43:55,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:55,073 INFO L225 Difference]: With dead ends: 82 [2021-05-02 19:43:55,073 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 19:43:55,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:43:55,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 19:43:55,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-02 19:43:55,089 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 19:43:55,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-05-02 19:43:55,091 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2021-05-02 19:43:55,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:55,092 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-05-02 19:43:55,092 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 19:43:55,092 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-05-02 19:43:55,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 19:43:55,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:55,099 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 19:43:55,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:43:55,300 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:55,300 INFO L82 PathProgramCache]: Analyzing trace with hash 800232443, now seen corresponding path program 1 times [2021-05-02 19:43:55,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:55,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722547297] [2021-05-02 19:43:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:55,307 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:43:55,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428648338] [2021-05-02 19:43:55,308 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 19:43:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:43:55,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:43:55,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:43:55,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:55,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:55,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:55,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:55,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:55,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:55,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:55,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:55,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:55,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:55,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:55,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:55,556 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 19:43:55,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:43:55,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722547297] [2021-05-02 19:43:55,556 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:43:55,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428648338] [2021-05-02 19:43:55,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428648338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:43:55,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:43:55,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:43:55,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319811872] [2021-05-02 19:43:55,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:43:55,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:43:55,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:43:55,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:43:55,558 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 19:43:55,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:55,703 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2021-05-02 19:43:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:43:55,704 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 19:43:55,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:55,705 INFO L225 Difference]: With dead ends: 86 [2021-05-02 19:43:55,705 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 19:43:55,705 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:43:55,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 19:43:55,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-02 19:43:55,710 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 19:43:55,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-05-02 19:43:55,710 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2021-05-02 19:43:55,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:55,711 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-05-02 19:43:55,711 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 19:43:55,711 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-05-02 19:43:55,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 19:43:55,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:55,712 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 19:43:55,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:43:55,933 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:55,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:55,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1984817020, now seen corresponding path program 1 times [2021-05-02 19:43:55,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:55,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121607589] [2021-05-02 19:43:55,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:55,943 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:43:55,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268758729] [2021-05-02 19:43:55,944 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 19:43:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:43:56,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:43:56,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:43:56,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,183 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 19:43:56,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:43:56,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121607589] [2021-05-02 19:43:56,183 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:43:56,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268758729] [2021-05-02 19:43:56,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268758729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:43:56,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:43:56,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:43:56,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875457474] [2021-05-02 19:43:56,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:43:56,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:43:56,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:43:56,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:43:56,185 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 19:43:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:56,251 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2021-05-02 19:43:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:43:56,252 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 19:43:56,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:56,255 INFO L225 Difference]: With dead ends: 108 [2021-05-02 19:43:56,255 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 19:43:56,255 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:43:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 19:43:56,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-05-02 19:43:56,263 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 19:43:56,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-05-02 19:43:56,264 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 50 [2021-05-02 19:43:56,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:56,264 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-05-02 19:43:56,264 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 19:43:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-05-02 19:43:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 19:43:56,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:56,266 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 19:43:56,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 19:43:56,473 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:56,473 INFO L82 PathProgramCache]: Analyzing trace with hash 960315114, now seen corresponding path program 1 times [2021-05-02 19:43:56,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:56,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122633009] [2021-05-02 19:43:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:56,482 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:43:56,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155552106] [2021-05-02 19:43:56,482 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 19:43:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:43:56,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 19:43:56,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:43:56,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:56,819 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 19:43:56,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:43:56,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122633009] [2021-05-02 19:43:56,820 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:43:56,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155552106] [2021-05-02 19:43:56,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155552106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:43:56,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:43:56,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:43:56,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973248880] [2021-05-02 19:43:56,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:43:56,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:43:56,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:43:56,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:43:56,822 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 19:43:56,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:56,990 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2021-05-02 19:43:56,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:43:56,991 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 19:43:56,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:56,992 INFO L225 Difference]: With dead ends: 116 [2021-05-02 19:43:56,992 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 19:43:56,992 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:43:56,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 19:43:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-02 19:43:56,996 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 19:43:56,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2021-05-02 19:43:56,997 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 55 [2021-05-02 19:43:56,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:56,997 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2021-05-02 19:43:56,998 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 19:43:56,998 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2021-05-02 19:43:56,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 19:43:56,998 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:56,998 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 19:43:57,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:43:57,221 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:57,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1119467195, now seen corresponding path program 1 times [2021-05-02 19:43:57,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:57,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373949509] [2021-05-02 19:43:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:57,230 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:43:57,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578692775] [2021-05-02 19:43:57,233 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 19:43:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:43:57,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:43:57,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:43:57,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,422 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 19:43:57,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:43:57,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373949509] [2021-05-02 19:43:57,423 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:43:57,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578692775] [2021-05-02 19:43:57,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578692775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:43:57,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:43:57,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:43:57,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551192908] [2021-05-02 19:43:57,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:43:57,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:43:57,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:43:57,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:43:57,425 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 19:43:57,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:57,479 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2021-05-02 19:43:57,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:43:57,479 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 19:43:57,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:57,483 INFO L225 Difference]: With dead ends: 106 [2021-05-02 19:43:57,483 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 19:43:57,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:43:57,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 19:43:57,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-02 19:43:57,490 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 19:43:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-05-02 19:43:57,491 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 58 [2021-05-02 19:43:57,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:57,491 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-05-02 19:43:57,492 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 19:43:57,492 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-05-02 19:43:57,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 19:43:57,492 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:57,493 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 19:43:57,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:43:57,713 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:57,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1669598821, now seen corresponding path program 1 times [2021-05-02 19:43:57,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:57,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177154491] [2021-05-02 19:43:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:57,721 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:43:57,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122177898] [2021-05-02 19:43:57,721 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 19:43:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:43:57,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 19:43:57,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:43:57,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:57,943 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 19:43:57,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:43:57,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177154491] [2021-05-02 19:43:57,944 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:43:57,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122177898] [2021-05-02 19:43:57,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122177898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:43:57,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:43:57,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:43:57,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213101740] [2021-05-02 19:43:57,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:43:57,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:43:57,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:43:57,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:43:57,946 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 19:43:58,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:58,011 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-05-02 19:43:58,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:43:58,011 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 19:43:58,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:58,012 INFO L225 Difference]: With dead ends: 128 [2021-05-02 19:43:58,012 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 19:43:58,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:43:58,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 19:43:58,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-05-02 19:43:58,017 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 19:43:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2021-05-02 19:43:58,017 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 74 [2021-05-02 19:43:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:58,018 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2021-05-02 19:43:58,018 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 19:43:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2021-05-02 19:43:58,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 19:43:58,019 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:58,019 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 19:43:58,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 19:43:58,233 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:58,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:58,233 INFO L82 PathProgramCache]: Analyzing trace with hash -286098381, now seen corresponding path program 1 times [2021-05-02 19:43:58,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:58,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802976128] [2021-05-02 19:43:58,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:58,241 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:43:58,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676008961] [2021-05-02 19:43:58,241 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 19:43:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:43:58,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 19:43:58,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:43:58,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:58,948 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 19:43:58,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:43:58,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802976128] [2021-05-02 19:43:58,948 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:43:58,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676008961] [2021-05-02 19:43:58,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676008961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:43:58,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:43:58,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:43:58,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481393017] [2021-05-02 19:43:58,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:43:58,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:43:58,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:43:58,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:43:58,950 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 19:43:59,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:59,356 INFO L93 Difference]: Finished difference Result 156 states and 188 transitions. [2021-05-02 19:43:59,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:43:59,356 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 19:43:59,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:59,357 INFO L225 Difference]: With dead ends: 156 [2021-05-02 19:43:59,357 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 19:43:59,358 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 282.9ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:43:59,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 19:43:59,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-05-02 19:43:59,363 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 19:43:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 182 transitions. [2021-05-02 19:43:59,364 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 182 transitions. Word has length 79 [2021-05-02 19:43:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:59,364 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 182 transitions. [2021-05-02 19:43:59,364 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 19:43:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 182 transitions. [2021-05-02 19:43:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 19:43:59,365 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:59,365 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 19:43:59,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 19:43:59,582 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:59,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:59,583 INFO L82 PathProgramCache]: Analyzing trace with hash -792688430, now seen corresponding path program 2 times [2021-05-02 19:43:59,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:59,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542195845] [2021-05-02 19:43:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:59,602 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:43:59,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036279992] [2021-05-02 19:43:59,602 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 19:43:59,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:43:59,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:43:59,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 19:43:59,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:43:59,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:59,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:59,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:59,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:59,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:59,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:59,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:59,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:59,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:59,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:59,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:59,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:59,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:59,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:59,823 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 19:43:59,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:43:59,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542195845] [2021-05-02 19:43:59,824 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:43:59,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036279992] [2021-05-02 19:43:59,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036279992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:43:59,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:43:59,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:43:59,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706731727] [2021-05-02 19:43:59,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:43:59,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:43:59,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:43:59,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:43:59,825 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 19:43:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:59,897 INFO L93 Difference]: Finished difference Result 154 states and 185 transitions. [2021-05-02 19:43:59,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:43:59,898 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 19:43:59,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:59,899 INFO L225 Difference]: With dead ends: 154 [2021-05-02 19:43:59,899 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 19:43:59,899 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:43:59,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 19:43:59,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-05-02 19:43:59,904 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 19:43:59,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2021-05-02 19:43:59,904 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 82 [2021-05-02 19:43:59,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:59,905 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2021-05-02 19:43:59,905 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 19:43:59,905 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2021-05-02 19:43:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 19:43:59,906 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:59,906 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 19:44:00,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 19:44:00,129 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:44:00,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:44:00,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2126505818, now seen corresponding path program 1 times [2021-05-02 19:44:00,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:44:00,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178679691] [2021-05-02 19:44:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:44:00,136 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:44:00,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626694982] [2021-05-02 19:44:00,136 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 19:44:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:44:00,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 19:44:00,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:44:00,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,369 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 19:44:00,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:44:00,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178679691] [2021-05-02 19:44:00,369 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:44:00,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626694982] [2021-05-02 19:44:00,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626694982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:44:00,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:44:00,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:44:00,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894920842] [2021-05-02 19:44:00,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:44:00,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:44:00,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:44:00,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:44:00,371 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 19:44:00,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:44:00,486 INFO L93 Difference]: Finished difference Result 180 states and 211 transitions. [2021-05-02 19:44:00,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:44:00,486 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 19:44:00,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:44:00,488 INFO L225 Difference]: With dead ends: 180 [2021-05-02 19:44:00,488 INFO L226 Difference]: Without dead ends: 180 [2021-05-02 19:44:00,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:44:00,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-02 19:44:00,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2021-05-02 19:44:00,493 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 19:44:00,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 209 transitions. [2021-05-02 19:44:00,494 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 209 transitions. Word has length 90 [2021-05-02 19:44:00,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:44:00,494 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 209 transitions. [2021-05-02 19:44:00,494 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 19:44:00,495 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 209 transitions. [2021-05-02 19:44:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 19:44:00,495 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:44:00,495 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 19:44:00,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:44:00,709 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:44:00,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:44:00,709 INFO L82 PathProgramCache]: Analyzing trace with hash -169757262, now seen corresponding path program 2 times [2021-05-02 19:44:00,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:44:00,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713658841] [2021-05-02 19:44:00,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:44:00,716 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:44:00,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691575398] [2021-05-02 19:44:00,716 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 19:44:00,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:44:00,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:44:00,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 19:44:00,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:44:00,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:00,948 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 19:44:00,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:44:00,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713658841] [2021-05-02 19:44:00,948 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:44:00,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691575398] [2021-05-02 19:44:00,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691575398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:44:00,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:44:00,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:44:00,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820014108] [2021-05-02 19:44:00,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:44:00,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:44:00,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:44:00,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:44:00,950 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 19:44:01,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:44:01,049 INFO L93 Difference]: Finished difference Result 181 states and 212 transitions. [2021-05-02 19:44:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:44:01,050 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 19:44:01,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:44:01,051 INFO L225 Difference]: With dead ends: 181 [2021-05-02 19:44:01,051 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 19:44:01,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:44:01,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 19:44:01,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-05-02 19:44:01,057 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 19:44:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 212 transitions. [2021-05-02 19:44:01,058 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 212 transitions. Word has length 98 [2021-05-02 19:44:01,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:44:01,058 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 212 transitions. [2021-05-02 19:44:01,059 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 19:44:01,059 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 212 transitions. [2021-05-02 19:44:01,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 19:44:01,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:44:01,060 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 19:44:01,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 19:44:01,283 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:44:01,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:44:01,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1237757564, now seen corresponding path program 2 times [2021-05-02 19:44:01,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:44:01,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046155779] [2021-05-02 19:44:01,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:44:01,290 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:44:01,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702222389] [2021-05-02 19:44:01,290 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 19:44:01,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:44:01,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:44:01,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 19:44:01,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:44:01,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:01,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:01,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:01,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:01,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:01,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:01,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:01,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:01,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:01,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:01,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:01,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:01,712 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 19:44:01,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:44:01,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046155779] [2021-05-02 19:44:01,712 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:44:01,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702222389] [2021-05-02 19:44:01,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702222389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:44:01,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:44:01,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:44:01,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087831775] [2021-05-02 19:44:01,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:44:01,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:44:01,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:44:01,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:44:01,716 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 19:44:02,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:44:02,085 INFO L93 Difference]: Finished difference Result 214 states and 256 transitions. [2021-05-02 19:44:02,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:44:02,085 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 19:44:02,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:44:02,087 INFO L225 Difference]: With dead ends: 214 [2021-05-02 19:44:02,087 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 19:44:02,088 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:44:02,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 19:44:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2021-05-02 19:44:02,093 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 19:44:02,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 251 transitions. [2021-05-02 19:44:02,095 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 251 transitions. Word has length 103 [2021-05-02 19:44:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:44:02,095 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 251 transitions. [2021-05-02 19:44:02,095 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 19:44:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 251 transitions. [2021-05-02 19:44:02,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 19:44:02,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:44:02,096 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 19:44:02,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 19:44:02,313 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:44:02,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:44:02,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2014256518, now seen corresponding path program 3 times [2021-05-02 19:44:02,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:44:02,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789304440] [2021-05-02 19:44:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:44:02,327 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:44:02,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986987962] [2021-05-02 19:44:02,327 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 19:44:02,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 19:44:02,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:44:02,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 19:44:02,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:44:02,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:02,771 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 19:44:02,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:44:02,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789304440] [2021-05-02 19:44:02,771 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:44:02,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986987962] [2021-05-02 19:44:02,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986987962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:44:02,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:44:02,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 19:44:02,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477113603] [2021-05-02 19:44:02,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 19:44:02,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:44:02,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 19:44:02,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:44:02,773 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 19:44:11,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:44:11,118 INFO L93 Difference]: Finished difference Result 252 states and 298 transitions. [2021-05-02 19:44:11,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 19:44:11,119 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 19:44:11,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:44:11,120 INFO L225 Difference]: With dead ends: 252 [2021-05-02 19:44:11,121 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 19:44:11,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:44:11,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 19:44:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 235. [2021-05-02 19:44:11,127 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 19:44:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 270 transitions. [2021-05-02 19:44:11,128 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 270 transitions. Word has length 106 [2021-05-02 19:44:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:44:11,129 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 270 transitions. [2021-05-02 19:44:11,129 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 19:44:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 270 transitions. [2021-05-02 19:44:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 19:44:11,130 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:44:11,130 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 19:44:11,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 19:44:11,331 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:44:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:44:11,331 INFO L82 PathProgramCache]: Analyzing trace with hash 46832061, now seen corresponding path program 2 times [2021-05-02 19:44:11,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:44:11,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32487668] [2021-05-02 19:44:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:44:11,337 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:44:11,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592739856] [2021-05-02 19:44:11,338 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 19:44:11,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:44:11,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:44:11,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 19:44:11,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:44:11,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:11,678 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 19:44:11,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:44:11,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32487668] [2021-05-02 19:44:11,678 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:44:11,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592739856] [2021-05-02 19:44:11,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592739856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:44:11,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:44:11,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:44:11,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542699570] [2021-05-02 19:44:11,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:44:11,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:44:11,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:44:11,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:44:11,681 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 19:44:11,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:44:11,837 INFO L93 Difference]: Finished difference Result 275 states and 331 transitions. [2021-05-02 19:44:11,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:44:11,838 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 19:44:11,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:44:11,841 INFO L225 Difference]: With dead ends: 275 [2021-05-02 19:44:11,841 INFO L226 Difference]: Without dead ends: 247 [2021-05-02 19:44:11,841 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:44:11,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-02 19:44:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 227. [2021-05-02 19:44:11,847 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 19:44:11,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 271 transitions. [2021-05-02 19:44:11,848 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 271 transitions. Word has length 114 [2021-05-02 19:44:11,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:44:11,849 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 271 transitions. [2021-05-02 19:44:11,849 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 19:44:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 271 transitions. [2021-05-02 19:44:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 19:44:11,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:44:11,850 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 19:44:12,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:44:12,073 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:44:12,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:44:12,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1109340483, now seen corresponding path program 3 times [2021-05-02 19:44:12,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:44:12,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62679480] [2021-05-02 19:44:12,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:44:12,085 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:44:12,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051504088] [2021-05-02 19:44:12,085 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 19:44:12,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:44:12,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:44:12,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 19:44:12,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:44:12,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:12,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:12,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:12,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:12,406 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 19:44:12,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:44:12,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62679480] [2021-05-02 19:44:12,407 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:44:12,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051504088] [2021-05-02 19:44:12,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051504088] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:44:12,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:44:12,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:44:12,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976988211] [2021-05-02 19:44:12,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:44:12,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:44:12,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:44:12,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:44:12,408 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 19:44:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:44:14,688 INFO L93 Difference]: Finished difference Result 236 states and 281 transitions. [2021-05-02 19:44:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:44:14,688 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 19:44:14,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:44:14,689 INFO L225 Difference]: With dead ends: 236 [2021-05-02 19:44:14,690 INFO L226 Difference]: Without dead ends: 227 [2021-05-02 19:44:14,690 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:44:14,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-02 19:44:14,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2021-05-02 19:44:14,695 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 19:44:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 265 transitions. [2021-05-02 19:44:14,696 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 265 transitions. Word has length 114 [2021-05-02 19:44:14,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:44:14,696 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 265 transitions. [2021-05-02 19:44:14,697 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 19:44:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 265 transitions. [2021-05-02 19:44:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 19:44:14,698 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:44:14,698 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 19:44:14,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:44:14,925 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:44:14,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:44:14,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1953340215, now seen corresponding path program 4 times [2021-05-02 19:44:14,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:44:14,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131200329] [2021-05-02 19:44:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:44:14,934 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:44:14,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088175854] [2021-05-02 19:44:14,935 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 19:44:15,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:44:15,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:44:15,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 19:44:15,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:44:15,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:15,536 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 19:44:15,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:44:15,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131200329] [2021-05-02 19:44:15,537 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:44:15,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088175854] [2021-05-02 19:44:15,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088175854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:44:15,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:44:15,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 19:44:15,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268914283] [2021-05-02 19:44:15,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 19:44:15,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:44:15,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 19:44:15,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-02 19:44:15,539 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 19:44:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:44:16,080 INFO L93 Difference]: Finished difference Result 287 states and 345 transitions. [2021-05-02 19:44:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 19:44:16,081 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 19:44:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:44:16,083 INFO L225 Difference]: With dead ends: 287 [2021-05-02 19:44:16,083 INFO L226 Difference]: Without dead ends: 282 [2021-05-02 19:44:16,083 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:44:16,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-02 19:44:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 277. [2021-05-02 19:44:16,090 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 19:44:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 334 transitions. [2021-05-02 19:44:16,091 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 334 transitions. Word has length 122 [2021-05-02 19:44:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:44:16,091 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 334 transitions. [2021-05-02 19:44:16,092 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 19:44:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 334 transitions. [2021-05-02 19:44:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 19:44:16,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:44:16,093 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 19:44:16,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 19:44:16,294 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:44:16,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:44:16,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1409290752, now seen corresponding path program 3 times [2021-05-02 19:44:16,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:44:16,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230121784] [2021-05-02 19:44:16,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:44:16,302 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:44:16,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690458124] [2021-05-02 19:44:16,303 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 19:44:16,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 19:44:16,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:44:16,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:44:16,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:44:18,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:18,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:18,721 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 19:44:18,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:44:18,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230121784] [2021-05-02 19:44:18,721 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:44:18,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690458124] [2021-05-02 19:44:18,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690458124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:44:18,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:44:18,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:44:18,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051915725] [2021-05-02 19:44:18,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:44:18,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:44:18,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:44:18,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2021-05-02 19:44:18,723 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 19:44:25,707 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 19:44:54,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:44:54,274 INFO L93 Difference]: Finished difference Result 309 states and 381 transitions. [2021-05-02 19:44:54,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:44:54,274 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 19:44:54,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:44:54,276 INFO L225 Difference]: With dead ends: 309 [2021-05-02 19:44:54,276 INFO L226 Difference]: Without dead ends: 304 [2021-05-02 19:44:54,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 9131.2ms TimeCoverageRelationStatistics Valid=40, Invalid=114, Unknown=2, NotChecked=0, Total=156 [2021-05-02 19:44:54,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-02 19:44:54,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 234. [2021-05-02 19:44:54,283 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 19:44:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2021-05-02 19:44:54,284 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 130 [2021-05-02 19:44:54,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:44:54,284 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2021-05-02 19:44:54,284 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 19:44:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2021-05-02 19:44:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 19:44:54,286 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:44:54,286 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 19:44:54,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 19:44:54,501 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:44:54,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:44:54,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1769981228, now seen corresponding path program 4 times [2021-05-02 19:44:54,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:44:54,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905290153] [2021-05-02 19:44:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:44:54,514 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:44:54,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347028463] [2021-05-02 19:44:54,514 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 19:44:54,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:44:54,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:44:54,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 19:44:54,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:44:54,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:54,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:55,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:55,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:55,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:55,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:55,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:55,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:55,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:55,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:55,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:55,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:55,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:55,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:55,277 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 19:44:55,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:44:55,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905290153] [2021-05-02 19:44:55,277 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:44:55,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347028463] [2021-05-02 19:44:55,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347028463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:44:55,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:44:55,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 19:44:55,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289965809] [2021-05-02 19:44:55,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 19:44:55,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:44:55,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 19:44:55,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-02 19:44:55,279 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 19:44:55,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:44:55,931 INFO L93 Difference]: Finished difference Result 288 states and 334 transitions. [2021-05-02 19:44:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 19:44:55,932 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 19:44:55,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:44:55,934 INFO L225 Difference]: With dead ends: 288 [2021-05-02 19:44:55,934 INFO L226 Difference]: Without dead ends: 274 [2021-05-02 19:44:55,934 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-02 19:44:55,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-02 19:44:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2021-05-02 19:44:55,939 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 19:44:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 310 transitions. [2021-05-02 19:44:55,940 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 310 transitions. Word has length 138 [2021-05-02 19:44:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:44:55,941 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 310 transitions. [2021-05-02 19:44:55,941 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 19:44:55,941 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 310 transitions. [2021-05-02 19:44:55,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 19:44:55,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:44:55,943 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 19:44:56,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:44:56,164 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:44:56,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:44:56,164 INFO L82 PathProgramCache]: Analyzing trace with hash -493605665, now seen corresponding path program 5 times [2021-05-02 19:44:56,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:44:56,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027447436] [2021-05-02 19:44:56,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:44:56,172 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:44:56,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108115841] [2021-05-02 19:44:56,173 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 19:44:56,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-02 19:44:56,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:44:56,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 19:44:56,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:44:56,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,497 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 19:44:56,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:44:56,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027447436] [2021-05-02 19:44:56,497 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:44:56,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108115841] [2021-05-02 19:44:56,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108115841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:44:56,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:44:56,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:44:56,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426320792] [2021-05-02 19:44:56,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:44:56,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:44:56,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:44:56,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:44:56,499 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 19:44:56,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:44:56,543 INFO L93 Difference]: Finished difference Result 268 states and 297 transitions. [2021-05-02 19:44:56,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:44:56,543 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 19:44:56,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:44:56,545 INFO L225 Difference]: With dead ends: 268 [2021-05-02 19:44:56,545 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 19:44:56,545 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:44:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 19:44:56,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2021-05-02 19:44:56,550 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 19:44:56,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 214 transitions. [2021-05-02 19:44:56,550 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 214 transitions. Word has length 154 [2021-05-02 19:44:56,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:44:56,551 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 214 transitions. [2021-05-02 19:44:56,551 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 19:44:56,551 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 214 transitions. [2021-05-02 19:44:56,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 19:44:56,552 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:44:56,552 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 19:44:56,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 19:44:56,773 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:44:56,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:44:56,773 INFO L82 PathProgramCache]: Analyzing trace with hash -604387605, now seen corresponding path program 6 times [2021-05-02 19:44:56,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:44:56,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241722093] [2021-05-02 19:44:56,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:44:56,781 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:44:56,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204790627] [2021-05-02 19:44:56,781 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 19:44:56,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 19:44:56,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:44:56,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 19:44:56,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:44:56,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:56,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,162 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 19:44:57,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:44:57,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241722093] [2021-05-02 19:44:57,162 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:44:57,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204790627] [2021-05-02 19:44:57,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204790627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:44:57,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:44:57,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:44:57,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225657172] [2021-05-02 19:44:57,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:44:57,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:44:57,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:44:57,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:44:57,164 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 19:44:57,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:44:57,397 INFO L93 Difference]: Finished difference Result 294 states and 324 transitions. [2021-05-02 19:44:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 19:44:57,398 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 19:44:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:44:57,399 INFO L225 Difference]: With dead ends: 294 [2021-05-02 19:44:57,399 INFO L226 Difference]: Without dead ends: 294 [2021-05-02 19:44:57,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:44:57,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-02 19:44:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 286. [2021-05-02 19:44:57,409 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 19:44:57,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 316 transitions. [2021-05-02 19:44:57,411 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 316 transitions. Word has length 162 [2021-05-02 19:44:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:44:57,411 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 316 transitions. [2021-05-02 19:44:57,412 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 19:44:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 316 transitions. [2021-05-02 19:44:57,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-02 19:44:57,413 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:44:57,413 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 19:44:57,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:44:57,621 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:44:57,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:44:57,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1937088971, now seen corresponding path program 5 times [2021-05-02 19:44:57,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:44:57,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852322704] [2021-05-02 19:44:57,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:44:57,627 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:44:57,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683931145] [2021-05-02 19:44:57,627 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 19:44:57,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-02 19:44:57,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:44:57,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:44:57,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:44:57,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:57,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:58,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:58,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:58,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:58,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:58,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:58,067 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 19:44:58,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:44:58,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852322704] [2021-05-02 19:44:58,068 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:44:58,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683931145] [2021-05-02 19:44:58,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683931145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:44:58,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:44:58,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:44:58,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994098168] [2021-05-02 19:44:58,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:44:58,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:44:58,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:44:58,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:44:58,069 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 19:44:58,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:44:58,308 INFO L93 Difference]: Finished difference Result 350 states and 390 transitions. [2021-05-02 19:44:58,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:44:58,308 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 19:44:58,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:44:58,310 INFO L225 Difference]: With dead ends: 350 [2021-05-02 19:44:58,310 INFO L226 Difference]: Without dead ends: 350 [2021-05-02 19:44:58,310 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:44:58,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-02 19:44:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 339. [2021-05-02 19:44:58,316 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 19:44:58,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 379 transitions. [2021-05-02 19:44:58,318 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 379 transitions. Word has length 178 [2021-05-02 19:44:58,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:44:58,318 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 379 transitions. [2021-05-02 19:44:58,318 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 19:44:58,318 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 379 transitions. [2021-05-02 19:44:58,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-05-02 19:44:58,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:44:58,321 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 19:44:58,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 19:44:58,544 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:44:58,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:44:58,544 INFO L82 PathProgramCache]: Analyzing trace with hash 846162435, now seen corresponding path program 3 times [2021-05-02 19:44:58,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:44:58,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659073802] [2021-05-02 19:44:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:44:58,556 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:44:58,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268789893] [2021-05-02 19:44:58,556 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 19:44:58,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 19:44:58,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:44:58,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 19:44:58,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:44:58,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:58,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:58,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:58,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:58,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:58,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:58,984 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 19:44:58,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:44:58,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659073802] [2021-05-02 19:44:58,985 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:44:58,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268789893] [2021-05-02 19:44:58,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268789893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:44:58,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:44:58,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:44:58,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559252514] [2021-05-02 19:44:58,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:44:58,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:44:58,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:44:58,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:44:58,986 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 19:45:07,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:07,264 INFO L93 Difference]: Finished difference Result 346 states and 384 transitions. [2021-05-02 19:45:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:45:07,265 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 19:45:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:07,266 INFO L225 Difference]: With dead ends: 346 [2021-05-02 19:45:07,266 INFO L226 Difference]: Without dead ends: 331 [2021-05-02 19:45:07,267 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:45:07,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-02 19:45:07,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2021-05-02 19:45:07,273 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 19:45:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 359 transitions. [2021-05-02 19:45:07,274 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 359 transitions. Word has length 183 [2021-05-02 19:45:07,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:07,275 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 359 transitions. [2021-05-02 19:45:07,275 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 19:45:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 359 transitions. [2021-05-02 19:45:07,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-02 19:45:07,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:07,276 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 19:45:07,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 19:45:07,499 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:07,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:07,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2011105538, now seen corresponding path program 7 times [2021-05-02 19:45:07,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:07,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543303651] [2021-05-02 19:45:07,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:07,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:07,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474016882] [2021-05-02 19:45:07,506 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 19:45:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:07,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:45:07,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:07,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:07,931 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 19:45:07,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:07,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543303651] [2021-05-02 19:45:07,931 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:07,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474016882] [2021-05-02 19:45:07,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474016882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:45:07,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:45:07,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:45:07,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202850612] [2021-05-02 19:45:07,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:45:07,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:07,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:45:07,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:45:07,932 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 19:45:08,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:08,270 INFO L93 Difference]: Finished difference Result 338 states and 373 transitions. [2021-05-02 19:45:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 19:45:08,270 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 19:45:08,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:08,272 INFO L225 Difference]: With dead ends: 338 [2021-05-02 19:45:08,272 INFO L226 Difference]: Without dead ends: 338 [2021-05-02 19:45:08,272 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:45:08,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-02 19:45:08,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 330. [2021-05-02 19:45:08,277 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 19:45:08,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 365 transitions. [2021-05-02 19:45:08,279 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 365 transitions. Word has length 186 [2021-05-02 19:45:08,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:08,279 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 365 transitions. [2021-05-02 19:45:08,279 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 19:45:08,279 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 365 transitions. [2021-05-02 19:45:08,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-02 19:45:08,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:08,281 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 19:45:08,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 19:45:08,501 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:08,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:08,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1344678430, now seen corresponding path program 6 times [2021-05-02 19:45:08,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:08,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345053315] [2021-05-02 19:45:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:08,514 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:08,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956897286] [2021-05-02 19:45:08,514 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 19:45:08,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-02 19:45:08,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:45:08,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 19:45:08,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:08,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:08,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:09,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:09,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:09,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:09,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:09,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:09,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:09,044 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 19:45:09,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:09,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345053315] [2021-05-02 19:45:09,045 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:09,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956897286] [2021-05-02 19:45:09,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956897286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:45:09,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:45:09,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:45:09,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364040386] [2021-05-02 19:45:09,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:45:09,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:09,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:45:09,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:45:09,047 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 19:45:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:15,403 INFO L93 Difference]: Finished difference Result 353 states and 383 transitions. [2021-05-02 19:45:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:45:15,404 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 19:45:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:15,405 INFO L225 Difference]: With dead ends: 353 [2021-05-02 19:45:15,406 INFO L226 Difference]: Without dead ends: 347 [2021-05-02 19:45:15,406 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:45:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-02 19:45:15,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 346. [2021-05-02 19:45:15,411 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 19:45:15,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 375 transitions. [2021-05-02 19:45:15,413 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 375 transitions. Word has length 202 [2021-05-02 19:45:15,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:15,413 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 375 transitions. [2021-05-02 19:45:15,413 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 19:45:15,413 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 375 transitions. [2021-05-02 19:45:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 19:45:15,414 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:15,414 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 19:45:15,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 19:45:15,615 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:15,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1224029721, now seen corresponding path program 8 times [2021-05-02 19:45:15,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:15,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599092705] [2021-05-02 19:45:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:15,622 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:15,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549341311] [2021-05-02 19:45:15,622 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 19:45:15,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:45:15,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:45:15,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 19:45:15,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:15,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:15,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,408 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 19:45:16,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:16,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599092705] [2021-05-02 19:45:16,409 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:16,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549341311] [2021-05-02 19:45:16,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549341311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:45:16,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:45:16,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:45:16,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314649101] [2021-05-02 19:45:16,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:45:16,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:16,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:45:16,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:45:16,410 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 19:45:16,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:16,994 INFO L93 Difference]: Finished difference Result 424 states and 485 transitions. [2021-05-02 19:45:16,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 19:45:16,995 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 19:45:16,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:16,997 INFO L225 Difference]: With dead ends: 424 [2021-05-02 19:45:16,997 INFO L226 Difference]: Without dead ends: 424 [2021-05-02 19:45:16,998 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 307.8ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:45:16,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-05-02 19:45:17,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 390. [2021-05-02 19:45:17,005 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 19:45:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 446 transitions. [2021-05-02 19:45:17,007 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 446 transitions. Word has length 210 [2021-05-02 19:45:17,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:17,007 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 446 transitions. [2021-05-02 19:45:17,007 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 19:45:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 446 transitions. [2021-05-02 19:45:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 19:45:17,009 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:17,009 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 19:45:17,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:45:17,232 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:17,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1125291239, now seen corresponding path program 9 times [2021-05-02 19:45:17,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:17,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80005290] [2021-05-02 19:45:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:17,237 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:17,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150887010] [2021-05-02 19:45:17,238 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 19:45:17,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 19:45:17,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:45:17,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 19:45:17,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:17,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:17,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:27,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:27,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:27,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:29,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:31,335 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 19:45:31,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:31,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80005290] [2021-05-02 19:45:31,336 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:31,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150887010] [2021-05-02 19:45:31,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150887010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:45:31,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:45:31,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 19:45:31,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480031582] [2021-05-02 19:45:31,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 19:45:31,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:31,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 19:45:31,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=121, Unknown=4, NotChecked=0, Total=156 [2021-05-02 19:45:31,337 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 19:45:56,198 WARN L205 SmtUtils]: Spent 8.09 s on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-05-02 19:47:08,238 WARN L205 SmtUtils]: Spent 35.65 s on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-05-02 19:47:48,715 WARN L205 SmtUtils]: Spent 34.39 s on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-02 19:48:30,218 WARN L205 SmtUtils]: Spent 33.37 s on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-02 19:49:27,360 WARN L205 SmtUtils]: Spent 40.96 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-02 19:49:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:49:45,377 INFO L93 Difference]: Finished difference Result 522 states and 647 transitions. [2021-05-02 19:49:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:49:45,378 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 19:49:45,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:49:45,381 INFO L225 Difference]: With dead ends: 522 [2021-05-02 19:49:45,381 INFO L226 Difference]: Without dead ends: 516 [2021-05-02 19:49:45,381 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 198608.8ms TimeCoverageRelationStatistics Valid=117, Invalid=413, Unknown=22, NotChecked=0, Total=552 [2021-05-02 19:49:45,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-05-02 19:49:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 436. [2021-05-02 19:49:45,392 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 19:49:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 514 transitions. [2021-05-02 19:49:45,393 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 514 transitions. Word has length 210 [2021-05-02 19:49:45,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:49:45,394 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 514 transitions. [2021-05-02 19:49:45,394 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 19:49:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 514 transitions. [2021-05-02 19:49:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-02 19:49:45,396 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:49:45,396 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 19:49:45,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:49:45,609 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:49:45,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:49:45,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1541434116, now seen corresponding path program 10 times [2021-05-02 19:49:45,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:49:45,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332860395] [2021-05-02 19:49:45,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:49:45,619 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:49:45,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313186418] [2021-05-02 19:49:45,619 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 19:49:45,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:49:45,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:49:45,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 19:49:45,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:49:45,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:45,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:46,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:47,054 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 19:49:47,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:49:47,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332860395] [2021-05-02 19:49:47,055 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:49:47,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313186418] [2021-05-02 19:49:47,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313186418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:49:47,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:49:47,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-02 19:49:47,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386028086] [2021-05-02 19:49:47,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 19:49:47,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:49:47,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 19:49:47,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-05-02 19:49:47,056 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 19:49:48,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:49:48,488 INFO L93 Difference]: Finished difference Result 500 states and 578 transitions. [2021-05-02 19:49:48,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 19:49:48,489 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 19:49:48,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:49:48,490 INFO L225 Difference]: With dead ends: 500 [2021-05-02 19:49:48,491 INFO L226 Difference]: Without dead ends: 394 [2021-05-02 19:49:48,491 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 686.7ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-05-02 19:49:48,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-02 19:49:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2021-05-02 19:49:48,500 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 19:49:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 463 transitions. [2021-05-02 19:49:48,501 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 463 transitions. Word has length 242 [2021-05-02 19:49:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:49:48,501 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 463 transitions. [2021-05-02 19:49:48,501 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 19:49:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 463 transitions. [2021-05-02 19:49:48,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-02 19:49:48,503 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:49:48,503 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 19:49:48,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 19:49:48,721 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:49:48,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:49:48,721 INFO L82 PathProgramCache]: Analyzing trace with hash 716020763, now seen corresponding path program 11 times [2021-05-02 19:49:48,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:49:48,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112136314] [2021-05-02 19:49:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:49:48,727 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:49:48,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205870866] [2021-05-02 19:49:48,727 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 19:49:48,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 19:49:48,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:49:48,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 19:49:48,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:49:48,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:48,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:48,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:48,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:48,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:48,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:48,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:48,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:48,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:48,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:48,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:48,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:49:49,491 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 19:49:49,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:49:49,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112136314] [2021-05-02 19:49:49,492 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:49:49,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205870866] [2021-05-02 19:49:49,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205870866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:49:49,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:49:49,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:49:49,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004555390] [2021-05-02 19:49:49,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:49:49,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:49:49,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:49:49,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:49:49,493 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 19:49:50,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:49:50,154 INFO L93 Difference]: Finished difference Result 741 states and 877 transitions. [2021-05-02 19:49:50,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 19:49:50,155 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 19:49:50,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:49:50,158 INFO L225 Difference]: With dead ends: 741 [2021-05-02 19:49:50,158 INFO L226 Difference]: Without dead ends: 741 [2021-05-02 19:49:50,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=261, Invalid=441, Unknown=0, NotChecked=0, Total=702 [2021-05-02 19:49:50,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-05-02 19:49:50,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 705. [2021-05-02 19:49:50,172 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 19:49:50,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 840 transitions. [2021-05-02 19:49:50,174 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 840 transitions. Word has length 266 [2021-05-02 19:49:50,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:49:50,174 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 840 transitions. [2021-05-02 19:49:50,175 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 19:49:50,175 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 840 transitions. [2021-05-02 19:49:50,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-05-02 19:49:50,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:49:50,177 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 19:49:50,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 19:49:50,399 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:49:50,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:49:50,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1766699470, now seen corresponding path program 12 times [2021-05-02 19:49:50,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:49:50,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050513291] [2021-05-02 19:49:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:49:50,406 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:49:50,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177354411] [2021-05-02 19:49:50,406 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