/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/ps6-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:44:24,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:44:24,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:44:24,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:44:24,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:44:24,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:44:24,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:44:24,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:44:24,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:44:24,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:44:24,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:44:24,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:44:24,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:44:24,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:44:24,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:44:24,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:44:24,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:44:24,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:44:24,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:44:24,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:44:24,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:44:24,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:44:24,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:44:24,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:44:24,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:44:24,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:44:24,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:44:24,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:44:24,793 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:44:24,814 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:44:24,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:44:24,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:44:24,815 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:44:24,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:44:24,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:44:24,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:44:24,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:44:24,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:44:24,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:44:24,815 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:44:24,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:44:24,816 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:44:24,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:44:24,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:44:24,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:44:24,816 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:44:24,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:44:24,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:44:24,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:44:24,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:44:24,817 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:44:24,817 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:44:25,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:44:25,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:44:25,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:44:25,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:44:25,191 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:44:25,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound100.c [2021-05-02 22:44:25,249 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4bab18f6/e1b7f254fbfd45eebecafce809afa154/FLAG5990172ac [2021-05-02 22:44:25,870 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:44:25,870 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound100.c [2021-05-02 22:44:25,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4bab18f6/e1b7f254fbfd45eebecafce809afa154/FLAG5990172ac [2021-05-02 22:44:26,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4bab18f6/e1b7f254fbfd45eebecafce809afa154 [2021-05-02 22:44:26,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:44:26,035 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:44:26,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:44:26,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:44:26,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:44:26,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:44:26" (1/1) ... [2021-05-02 22:44:26,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50cbe6d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:44:26, skipping insertion in model container [2021-05-02 22:44:26,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:44:26" (1/1) ... [2021-05-02 22:44:26,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:44:26,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:44:26,206 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/ps6-ll_valuebound100.c[458,471] [2021-05-02 22:44:26,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:44:26,260 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:44:26,275 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/ps6-ll_valuebound100.c[458,471] [2021-05-02 22:44:26,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:44:26,341 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:44:26,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:44:26 WrapperNode [2021-05-02 22:44:26,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:44:26,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:44:26,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:44:26,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:44:26,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:44:26" (1/1) ... [2021-05-02 22:44:26,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:44:26" (1/1) ... [2021-05-02 22:44:26,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:44:26" (1/1) ... [2021-05-02 22:44:26,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:44:26" (1/1) ... [2021-05-02 22:44:26,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:44:26" (1/1) ... [2021-05-02 22:44:26,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:44:26" (1/1) ... [2021-05-02 22:44:26,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:44:26" (1/1) ... [2021-05-02 22:44:26,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:44:26,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:44:26,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:44:26,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:44:26,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:44:26" (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 22:44:26,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:44:26,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:44:26,473 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:44:26,473 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:44:26,473 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:44:26,473 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:44:26,473 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:44:26,473 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:44:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:44:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:44:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:44:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:44:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:44:26,475 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:44:26,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:44:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:44:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:44:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:44:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:44:26,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:44:26,628 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:44:26,629 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:44:26,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:44:26 BoogieIcfgContainer [2021-05-02 22:44:26,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:44:26,631 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:44:26,631 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:44:26,631 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:44:26,634 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:44:26" (1/1) ... [2021-05-02 22:44:26,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:44:26 BasicIcfg [2021-05-02 22:44:26,647 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:44:26,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:44:26,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:44:26,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:44:26,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:44:26" (1/4) ... [2021-05-02 22:44:26,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48073c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:44:26, skipping insertion in model container [2021-05-02 22:44:26,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:44:26" (2/4) ... [2021-05-02 22:44:26,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48073c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:44:26, skipping insertion in model container [2021-05-02 22:44:26,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:44:26" (3/4) ... [2021-05-02 22:44:26,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48073c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:44:26, skipping insertion in model container [2021-05-02 22:44:26,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:44:26" (4/4) ... [2021-05-02 22:44:26,653 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound100.cJordan [2021-05-02 22:44:26,658 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:44:26,661 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:44:26,675 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:44:26,689 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:44:26,690 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:44:26,690 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:44:26,690 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:44:26,690 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:44:26,690 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:44:26,690 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:44:26,690 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:44:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:44:26,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 22:44:26,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:44:26,707 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:44:26,707 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:44:26,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:44:26,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2021-05-02 22:44:26,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:44:26,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907573994] [2021-05-02 22:44:26,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:44:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:44:26,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:44:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:44:26,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:44:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:44:26,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 22:44:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:44:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 22:44:26,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:44:26,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907573994] [2021-05-02 22:44:26,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907573994] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:44:26,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:44:26,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:44:26,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61898059] [2021-05-02 22:44:26,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:44:26,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:44:26,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:44:26,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:44:26,977 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:44:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:44:29,169 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-02 22:44:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:44:29,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 22:44:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:44:29,175 INFO L225 Difference]: With dead ends: 29 [2021-05-02 22:44:29,175 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 22:44:29,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:44:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 22:44:29,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 22:44:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:44:29,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 22:44:29,240 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-02 22:44:29,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:44:29,240 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 22:44:29,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:44:29,241 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 22:44:29,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 22:44:29,242 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:44:29,242 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:44:29,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:44:29,243 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:44:29,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:44:29,252 INFO L82 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2021-05-02 22:44:29,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:44:29,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191347542] [2021-05-02 22:44:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:44:29,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:44:29,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745628503] [2021-05-02 22:44:29,280 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 22:44:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:44:29,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:44:29,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:44:29,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 22:44:29,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:44:29,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191347542] [2021-05-02 22:44:29,413 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:44:29,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745628503] [2021-05-02 22:44:29,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745628503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:44:29,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:44:29,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:44:29,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942665189] [2021-05-02 22:44:29,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:44:29,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:44:29,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:44:29,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:44:29,416 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 22:44:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:44:29,466 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-02 22:44:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:44:29,466 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-02 22:44:29,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:44:29,467 INFO L225 Difference]: With dead ends: 33 [2021-05-02 22:44:29,467 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 22:44:29,468 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:44:29,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 22:44:29,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 22:44:29,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:44:29,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-02 22:44:29,472 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-02 22:44:29,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:44:29,472 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-02 22:44:29,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 22:44:29,473 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-02 22:44:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 22:44:29,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:44:29,473 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:44:29,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:44:29,692 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:44:29,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:44:29,693 INFO L82 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2021-05-02 22:44:29,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:44:29,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142098052] [2021-05-02 22:44:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:44:29,703 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:44:29,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045207000] [2021-05-02 22:44:29,703 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 22:44:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:44:29,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:44:29,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:44:29,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 22:44:29,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:44:29,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142098052] [2021-05-02 22:44:29,861 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:44:29,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045207000] [2021-05-02 22:44:29,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045207000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:44:29,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:44:29,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:44:29,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104669967] [2021-05-02 22:44:29,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:44:29,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:44:29,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:44:29,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:44:29,862 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 22:44:30,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:44:30,475 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-02 22:44:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:44:30,475 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 29 [2021-05-02 22:44:30,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:44:30,476 INFO L225 Difference]: With dead ends: 40 [2021-05-02 22:44:30,476 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 22:44:30,476 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:44:30,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 22:44:30,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 22:44:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:44:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-02 22:44:30,480 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-02 22:44:30,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:44:30,481 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-02 22:44:30,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 22:44:30,481 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-02 22:44:30,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 22:44:30,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:44:30,482 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:44:30,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:44:30,697 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:44:30,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:44:30,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1813677706, now seen corresponding path program 2 times [2021-05-02 22:44:30,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:44:30,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612548381] [2021-05-02 22:44:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:44:30,706 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:44:30,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190387815] [2021-05-02 22:44:30,706 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 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 22:44:30,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:44:30,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:44:30,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 22:44:30,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:44:30,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:30,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:30,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 22:44:31,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:44:31,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612548381] [2021-05-02 22:44:31,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:44:31,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190387815] [2021-05-02 22:44:31,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190387815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:44:31,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:44:31,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:44:31,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532783361] [2021-05-02 22:44:31,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:44:31,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:44:31,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:44:31,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:44:31,117 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:44:33,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:44:33,210 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-05-02 22:44:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:44:33,214 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 22:44:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:44:33,215 INFO L225 Difference]: With dead ends: 49 [2021-05-02 22:44:33,215 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 22:44:33,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:44:33,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 22:44:33,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-02 22:44:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:44:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-02 22:44:33,219 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-02 22:44:33,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:44:33,220 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-02 22:44:33,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:44:33,220 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-02 22:44:33,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 22:44:33,220 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:44:33,221 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:44:33,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:44:33,438 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:44:33,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:44:33,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2021-05-02 22:44:33,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:44:33,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077857745] [2021-05-02 22:44:33,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:44:33,446 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:44:33,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639972577] [2021-05-02 22:44:33,446 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 22:44:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:44:33,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 22:44:33,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:44:33,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:33,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:33,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:33,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:33,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:33,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:33,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:33,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:33,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:33,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:33,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:33,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:33,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:33,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 22:44:33,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:44:33,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077857745] [2021-05-02 22:44:33,778 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:44:33,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639972577] [2021-05-02 22:44:33,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639972577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:44:33,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:44:33,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:44:33,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025862637] [2021-05-02 22:44:33,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:44:33,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:44:33,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:44:33,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:44:33,779 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 22:44:33,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:44:33,876 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-05-02 22:44:33,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 22:44:33,877 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2021-05-02 22:44:33,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:44:33,878 INFO L225 Difference]: With dead ends: 54 [2021-05-02 22:44:33,878 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:44:33,879 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:44:33,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:44:33,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 22:44:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:44:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-02 22:44:33,882 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-02 22:44:33,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:44:33,883 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-02 22:44:33,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 22:44:33,883 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-02 22:44:33,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 22:44:33,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:44:33,884 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:44:34,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:44:34,108 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:44:34,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:44:34,108 INFO L82 PathProgramCache]: Analyzing trace with hash -241657738, now seen corresponding path program 3 times [2021-05-02 22:44:34,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:44:34,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674855862] [2021-05-02 22:44:34,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:44:34,117 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:44:34,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433595140] [2021-05-02 22:44:34,117 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 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 22:44:34,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 22:44:34,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:44:34,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:44:34,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:44:34,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:34,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 22:44:34,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:44:34,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674855862] [2021-05-02 22:44:34,352 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:44:34,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433595140] [2021-05-02 22:44:34,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433595140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:44:34,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:44:34,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:44:34,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050732846] [2021-05-02 22:44:34,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:44:34,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:44:34,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:44:34,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:44:34,354 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 22:44:34,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:44:34,448 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-02 22:44:34,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:44:34,448 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-02 22:44:34,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:44:34,449 INFO L225 Difference]: With dead ends: 50 [2021-05-02 22:44:34,449 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:44:34,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:44:34,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:44:34,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-02 22:44:34,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:44:34,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 22:44:34,457 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-02 22:44:34,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:44:34,458 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 22:44:34,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 22:44:34,458 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 22:44:34,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 22:44:34,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:44:34,459 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:44:34,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 22:44:34,675 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:44:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:44:34,675 INFO L82 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2021-05-02 22:44:34,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:44:34,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111026340] [2021-05-02 22:44:34,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:44:34,683 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:44:34,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596130766] [2021-05-02 22:44:34,683 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 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 22:44:34,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:44:34,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:44:34,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 22:44:34,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:44:34,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:34,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:34,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:34,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:34,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:34,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:34,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:34,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:34,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:34,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:34,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:34,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:34,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:34,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 22:44:34,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:44:34,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111026340] [2021-05-02 22:44:34,961 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:44:34,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596130766] [2021-05-02 22:44:34,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596130766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:44:34,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:44:34,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:44:34,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726096910] [2021-05-02 22:44:34,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:44:34,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:44:34,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:44:34,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:44:34,963 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 22:44:35,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:44:35,080 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-05-02 22:44:35,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:44:35,080 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), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2021-05-02 22:44:35,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:44:35,081 INFO L225 Difference]: With dead ends: 49 [2021-05-02 22:44:35,081 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 22:44:35,081 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 22:44:35,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 22:44:35,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-05-02 22:44:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:44:35,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-02 22:44:35,084 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-02 22:44:35,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:44:35,084 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-02 22:44:35,084 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), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 22:44:35,084 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-02 22:44:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 22:44:35,085 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:44:35,085 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:44:35,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:44:35,301 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:44:35,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:44:35,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2021-05-02 22:44:35,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:44:35,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482931566] [2021-05-02 22:44:35,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:44:35,309 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:44:35,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379152521] [2021-05-02 22:44:35,309 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 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 22:44:35,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 22:44:35,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:44:35,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 22:44:35,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:44:35,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:35,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:35,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:35,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:35,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:35,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:35,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:35,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:35,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:35,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:35,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-02 22:44:35,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:44:35,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482931566] [2021-05-02 22:44:35,935 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:44:35,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379152521] [2021-05-02 22:44:35,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379152521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:44:35,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:44:35,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:44:35,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343226593] [2021-05-02 22:44:35,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:44:35,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:44:35,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:44:35,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:44:35,936 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 22:44:36,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:44:36,069 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-05-02 22:44:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 22:44:36,070 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-05-02 22:44:36,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:44:36,071 INFO L225 Difference]: With dead ends: 50 [2021-05-02 22:44:36,071 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 22:44:36,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 22:44:36,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 22:44:36,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 22:44:36,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:44:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-02 22:44:36,074 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2021-05-02 22:44:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:44:36,074 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-02 22:44:36,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 22:44:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-02 22:44:36,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 22:44:36,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:44:36,075 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:44:36,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:44:36,286 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:44:36,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:44:36,287 INFO L82 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2021-05-02 22:44:36,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:44:36,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482854587] [2021-05-02 22:44:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:44:36,295 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:44:36,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872352136] [2021-05-02 22:44:36,295 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 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 22:44:36,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:44:36,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:44:36,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 22:44:36,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:44:36,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:36,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:36,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:36,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:36,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:36,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:36,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:36,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:36,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:36,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 22:44:36,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:44:36,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482854587] [2021-05-02 22:44:36,542 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:44:36,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872352136] [2021-05-02 22:44:36,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872352136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:44:36,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:44:36,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:44:36,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34755650] [2021-05-02 22:44:36,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:44:36,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:44:36,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:44:36,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:44:36,543 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-02 22:44:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:44:36,659 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-02 22:44:36,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:44:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2021-05-02 22:44:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:44:36,660 INFO L225 Difference]: With dead ends: 53 [2021-05-02 22:44:36,660 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 22:44:36,661 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:44:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 22:44:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 22:44:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:44:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-02 22:44:36,663 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 61 [2021-05-02 22:44:36,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:44:36,663 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-02 22:44:36,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-02 22:44:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-02 22:44:36,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 22:44:36,664 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:44:36,664 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:44:36,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 22:44:36,883 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:44:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:44:36,884 INFO L82 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2021-05-02 22:44:36,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:44:36,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152595393] [2021-05-02 22:44:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:44:36,890 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:44:36,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488608572] [2021-05-02 22:44:36,891 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 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 22:44:37,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 22:44:37,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:44:37,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 22:44:37,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:44:37,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:37,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:37,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:37,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:37,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:37,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:37,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:37,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:37,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:37,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:37,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 61 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 22:44:37,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:44:37,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152595393] [2021-05-02 22:44:37,611 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:44:37,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488608572] [2021-05-02 22:44:37,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488608572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:44:37,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:44:37,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 22:44:37,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590941893] [2021-05-02 22:44:37,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 22:44:37,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:44:37,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 22:44:37,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:44:37,612 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-02 22:44:37,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:44:37,774 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-05-02 22:44:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 22:44:37,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2021-05-02 22:44:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:44:37,775 INFO L225 Difference]: With dead ends: 56 [2021-05-02 22:44:37,775 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 22:44:37,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:44:37,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 22:44:37,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-02 22:44:37,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:44:37,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-05-02 22:44:37,779 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 68 [2021-05-02 22:44:37,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:44:37,779 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-05-02 22:44:37,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-02 22:44:37,779 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-05-02 22:44:37,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 22:44:37,780 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:44:37,780 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:44:37,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:44:37,985 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:44:37,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:44:37,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2021-05-02 22:44:37,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:44:37,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550442729] [2021-05-02 22:44:37,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:44:37,994 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:44:37,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87314191] [2021-05-02 22:44:37,994 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 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 22:44:39,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 22:44:39,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:44:39,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 22:44:39,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:44:39,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:39,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:39,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:39,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:39,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:39,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:39,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:39,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:39,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:39,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-02 22:44:39,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:44:39,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550442729] [2021-05-02 22:44:39,492 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:44:39,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87314191] [2021-05-02 22:44:39,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87314191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:44:39,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:44:39,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 22:44:39,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063484178] [2021-05-02 22:44:39,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 22:44:39,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:44:39,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 22:44:39,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-05-02 22:44:39,493 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-05-02 22:44:39,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:44:39,660 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-05-02 22:44:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 22:44:39,661 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2021-05-02 22:44:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:44:39,661 INFO L225 Difference]: With dead ends: 59 [2021-05-02 22:44:39,661 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 22:44:39,661 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-02 22:44:39,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 22:44:39,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 22:44:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 14 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:44:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-05-02 22:44:39,664 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 75 [2021-05-02 22:44:39,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:44:39,665 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-05-02 22:44:39,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-05-02 22:44:39,665 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-05-02 22:44:39,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 22:44:39,665 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:44:39,665 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:44:39,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 22:44:39,871 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:44:39,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:44:39,872 INFO L82 PathProgramCache]: Analyzing trace with hash 252865655, now seen corresponding path program 7 times [2021-05-02 22:44:39,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:44:39,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117064868] [2021-05-02 22:44:39,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:44:39,881 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:44:39,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73408444] [2021-05-02 22:44:39,881 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 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 22:44:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:44:44,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 22:44:44,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:44:44,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:44:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 87 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 22:44:44,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:44:44,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117064868] [2021-05-02 22:44:44,926 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:44:44,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73408444] [2021-05-02 22:44:44,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73408444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:44:44,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:44:44,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 22:44:44,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978602026] [2021-05-02 22:44:44,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 22:44:44,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:44:44,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 22:44:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:44:44,928 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-02 22:45:37,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:45:37,798 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-05-02 22:45:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 22:45:37,799 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 82 [2021-05-02 22:45:37,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:45:37,800 INFO L225 Difference]: With dead ends: 64 [2021-05-02 22:45:37,800 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 22:45:37,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-02 22:45:37,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 22:45:37,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-05-02 22:45:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 15 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:45:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 22:45:37,805 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 82 [2021-05-02 22:45:37,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:45:37,805 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 22:45:37,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-02 22:45:37,805 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 22:45:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 22:45:37,806 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:45:37,806 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:45:38,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 22:45:38,015 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:45:38,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:45:38,016 INFO L82 PathProgramCache]: Analyzing trace with hash 288751971, now seen corresponding path program 8 times [2021-05-02 22:45:38,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:45:38,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212321919] [2021-05-02 22:45:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:45:38,030 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:45:38,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591658946] [2021-05-02 22:45:38,031 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 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 22:45:39,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:45:39,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:45:39,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 22:45:39,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:45:39,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 23 proven. 108 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-05-02 22:45:39,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:45:39,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212321919] [2021-05-02 22:45:39,377 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:45:39,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591658946] [2021-05-02 22:45:39,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591658946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:45:39,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:45:39,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 22:45:39,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619007879] [2021-05-02 22:45:39,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 22:45:39,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:45:39,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 22:45:39,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-02 22:45:39,381 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 11 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-05-02 22:45:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:45:39,603 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-05-02 22:45:39,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 22:45:39,603 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 11 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 89 [2021-05-02 22:45:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:45:39,604 INFO L225 Difference]: With dead ends: 67 [2021-05-02 22:45:39,604 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 22:45:39,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-05-02 22:45:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 22:45:39,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2021-05-02 22:45:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 16 states have call successors, (16), 7 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 22:45:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-05-02 22:45:39,611 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 89 [2021-05-02 22:45:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:45:39,613 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-05-02 22:45:39,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 11 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-05-02 22:45:39,614 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-05-02 22:45:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 22:45:39,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:45:39,614 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:45:39,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:45:39,819 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:45:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:45:39,819 INFO L82 PathProgramCache]: Analyzing trace with hash -482784521, now seen corresponding path program 9 times [2021-05-02 22:45:39,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:45:39,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925223987] [2021-05-02 22:45:39,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:45:39,831 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:45:39,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698443566] [2021-05-02 22:45:39,831 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 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 22:46:27,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 22:46:27,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:27,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-02 22:46:27,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:27,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:27,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:38,672 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse1 (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse0 (* 5 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse2 (* (- 1) c_main_~y~0 c_main_~y~0))) (and (= c_main_~y~0 9) (= (mod (+ .cse0 .cse1 .cse2 .cse3) 12) 0) (<= (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (div (+ .cse3 (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse0 .cse2) 12)) (div (+ .cse3 .cse1 .cse0 .cse2) 12)) (<= c_main_~c~0 9) (< 8 c_main_~k~0))) is different from true [2021-05-02 22:46:38,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:39,813 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 30 DAG size of output: 8 [2021-05-02 22:46:39,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:39,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:39,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:39,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:39,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 69 proven. 163 refuted. 0 times theorem prover too weak. 140 trivial. 9 not checked. [2021-05-02 22:46:39,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:39,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925223987] [2021-05-02 22:46:39,862 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:39,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698443566] [2021-05-02 22:46:39,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698443566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:39,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:39,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 22:46:39,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493947184] [2021-05-02 22:46:39,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 22:46:39,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:39,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 22:46:39,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=340, Unknown=1, NotChecked=36, Total=420 [2021-05-02 22:46:39,863 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-05-02 22:46:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:41,013 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2021-05-02 22:46:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 22:46:41,014 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 96 [2021-05-02 22:46:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:41,014 INFO L225 Difference]: With dead ends: 68 [2021-05-02 22:46:41,015 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 22:46:41,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 12624.3ms TimeCoverageRelationStatistics Valid=58, Invalid=451, Unknown=1, NotChecked=42, Total=552 [2021-05-02 22:46:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 22:46:41,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 22:46:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 17 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:46:41,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-05-02 22:46:41,017 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 96 [2021-05-02 22:46:41,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:41,018 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-05-02 22:46:41,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-05-02 22:46:41,018 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-05-02 22:46:41,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 22:46:41,018 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:41,018 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:46:41,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 22:46:41,229 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:41,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:41,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1680878877, now seen corresponding path program 10 times [2021-05-02 22:46:41,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:41,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209013536] [2021-05-02 22:46:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:41,234 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:41,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051884710] [2021-05-02 22:46:41,234 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 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 22:46:41,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:46:41,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:41,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 22:46:41,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:41,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:41,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:41,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:41,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:41,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:41,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:41,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:41,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:41,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:41,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-05-02 22:46:41,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:41,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209013536] [2021-05-02 22:46:41,527 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:41,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051884710] [2021-05-02 22:46:41,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051884710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:41,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:41,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 22:46:41,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741121634] [2021-05-02 22:46:41,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 22:46:41,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:41,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 22:46:41,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:46:41,529 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2021-05-02 22:46:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:41,762 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2021-05-02 22:46:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 22:46:41,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 103 [2021-05-02 22:46:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:41,763 INFO L225 Difference]: With dead ends: 71 [2021-05-02 22:46:41,763 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 22:46:41,763 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-02 22:46:41,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 22:46:41,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-02 22:46:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 18 states have call successors, (18), 7 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:46:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-05-02 22:46:41,766 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 103 [2021-05-02 22:46:41,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:41,766 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-05-02 22:46:41,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2021-05-02 22:46:41,766 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-05-02 22:46:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 22:46:41,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:41,767 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:46:41,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:46:41,989 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:41,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1330067081, now seen corresponding path program 11 times [2021-05-02 22:46:41,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:41,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508527318] [2021-05-02 22:46:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:41,994 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:41,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139868935] [2021-05-02 22:46:41,995 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 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