/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/ps3-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:06:13,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:06:13,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:06:13,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:06:13,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:06:13,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:06:13,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:06:13,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:06:13,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:06:13,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:06:13,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:06:13,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:06:13,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:06:13,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:06:13,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:06:13,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:06:13,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:06:13,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:06:13,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:06:13,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:06:13,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:06:13,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:06:13,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:06:13,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:06:13,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:06:13,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:06:13,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:06:13,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:06:13,125 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:06:13,134 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:06:13,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:06:13,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:06:13,136 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:06:13,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:06:13,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:06:13,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:06:13,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:06:13,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:06:13,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:06:13,137 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:06:13,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:06:13,137 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:06:13,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:06:13,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:06:13,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:06:13,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:06:13,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:06:13,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:06:13,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:06:13,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:06:13,139 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:06:13,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:06:13,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:06:13,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:06:13,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:06:13,382 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:06:13,383 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:06:13,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_unwindbound10.c [2021-05-02 22:06:13,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c80b19d3/2777ee490e1d41d7bb8d35731b23901b/FLAG5dd4db6a3 [2021-05-02 22:06:13,726 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:06:13,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_unwindbound10.c [2021-05-02 22:06:13,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c80b19d3/2777ee490e1d41d7bb8d35731b23901b/FLAG5dd4db6a3 [2021-05-02 22:06:14,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c80b19d3/2777ee490e1d41d7bb8d35731b23901b [2021-05-02 22:06:14,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:06:14,170 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:06:14,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:06:14,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:06:14,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:06:14,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:06:14" (1/1) ... [2021-05-02 22:06:14,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@470782ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:14, skipping insertion in model container [2021-05-02 22:06:14,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:06:14" (1/1) ... [2021-05-02 22:06:14,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:06:14,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:06:14,308 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/ps3-ll_unwindbound10.c[458,471] [2021-05-02 22:06:14,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:06:14,329 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:06:14,339 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/ps3-ll_unwindbound10.c[458,471] [2021-05-02 22:06:14,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:06:14,378 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:06:14,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:14 WrapperNode [2021-05-02 22:06:14,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:06:14,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:06:14,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:06:14,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:06:14,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:14" (1/1) ... [2021-05-02 22:06:14,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:14" (1/1) ... [2021-05-02 22:06:14,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:14" (1/1) ... [2021-05-02 22:06:14,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:14" (1/1) ... [2021-05-02 22:06:14,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:14" (1/1) ... [2021-05-02 22:06:14,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:14" (1/1) ... [2021-05-02 22:06:14,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:14" (1/1) ... [2021-05-02 22:06:14,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:06:14,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:06:14,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:06:14,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:06:14,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:14" (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 22:06:14,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:06:14,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:06:14,470 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:06:14,470 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:06:14,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:06:14,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:06:14,471 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:06:14,471 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:06:14,471 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:06:14,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:06:14,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:06:14,471 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:06:14,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:06:14,472 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:06:14,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:06:14,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:06:14,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:06:14,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:06:14,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:06:14,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:06:14,662 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:06:14,663 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:06:14,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:06:14 BoogieIcfgContainer [2021-05-02 22:06:14,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:06:14,664 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:06:14,664 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:06:14,665 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:06:14,666 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:06:14" (1/1) ... [2021-05-02 22:06:14,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:06:14 BasicIcfg [2021-05-02 22:06:14,678 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:06:14,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:06:14,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:06:14,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:06:14,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:06:14" (1/4) ... [2021-05-02 22:06:14,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568f92b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:06:14, skipping insertion in model container [2021-05-02 22:06:14,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:14" (2/4) ... [2021-05-02 22:06:14,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568f92b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:06:14, skipping insertion in model container [2021-05-02 22:06:14,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:06:14" (3/4) ... [2021-05-02 22:06:14,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568f92b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:06:14, skipping insertion in model container [2021-05-02 22:06:14,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:06:14" (4/4) ... [2021-05-02 22:06:14,683 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll_unwindbound10.cJordan [2021-05-02 22:06:14,686 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:06:14,705 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:06:14,715 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:06:14,747 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:06:14,747 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:06:14,747 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:06:14,748 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:06:14,748 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:06:14,748 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:06:14,748 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:06:14,748 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:06:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:06:14,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 22:06:14,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:14,761 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:14,761 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:14,764 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-02 22:06:14,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:14,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650181671] [2021-05-02 22:06:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:14,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:06:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:06:14,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:14,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650181671] [2021-05-02 22:06:14,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650181671] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:06:14,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:06:14,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:06:14,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604069020] [2021-05-02 22:06:14,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:06:14,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:14,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:06:14,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:06:14,983 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:06:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:15,040 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-05-02 22:06:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:06:15,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 22:06:15,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:15,048 INFO L225 Difference]: With dead ends: 23 [2021-05-02 22:06:15,048 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 22:06:15,049 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:06:15,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 22:06:15,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 22:06:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:06:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 22:06:15,072 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 22:06:15,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:15,072 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 22:06:15,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:06:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 22:06:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:06:15,073 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:15,073 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:15,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:06:15,073 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:15,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-02 22:06:15,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:15,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565906367] [2021-05-02 22:06:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:15,103 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:15,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944163380] [2021-05-02 22:06:15,103 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 22:06:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:15,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 22:06:15,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:06:15,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:15,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:15,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:15,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:15,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:06:15,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:15,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565906367] [2021-05-02 22:06:15,273 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:06:15,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944163380] [2021-05-02 22:06:15,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944163380] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:06:15,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:06:15,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 22:06:15,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258235436] [2021-05-02 22:06:15,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 22:06:15,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:15,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 22:06:15,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:06:15,277 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:06:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:15,287 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-02 22:06:15,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 22:06:15,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 22:06:15,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:15,289 INFO L225 Difference]: With dead ends: 19 [2021-05-02 22:06:15,289 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 22:06:15,290 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:06:15,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 22:06:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 22:06:15,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:06:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 22:06:15,298 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-02 22:06:15,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:15,299 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 22:06:15,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:06:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 22:06:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:06:15,301 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:15,306 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:15,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:06:15,523 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:15,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:15,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-02 22:06:15,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:15,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168336549] [2021-05-02 22:06:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:15,537 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:15,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742022423] [2021-05-02 22:06:15,537 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 22:06:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:15,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 22:06:15,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:06:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:06:15,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:15,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168336549] [2021-05-02 22:06:15,630 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:06:15,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742022423] [2021-05-02 22:06:15,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742022423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:06:15,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:06:15,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 22:06:15,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841350617] [2021-05-02 22:06:15,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:06:15,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:15,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:06:15,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:06:15,631 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:06:15,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:15,654 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-02 22:06:15,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 22:06:15,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 22:06:15,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:15,655 INFO L225 Difference]: With dead ends: 26 [2021-05-02 22:06:15,655 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 22:06:15,655 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:06:15,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 22:06:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 22:06:15,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:06:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-02 22:06:15,658 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-02 22:06:15,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:15,659 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-02 22:06:15,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:06:15,659 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-02 22:06:15,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 22:06:15,659 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:15,659 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:15,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:06:15,861 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:15,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:15,862 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-02 22:06:15,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:15,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235661178] [2021-05-02 22:06:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:15,870 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:15,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712800395] [2021-05-02 22:06:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:06:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:15,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 22:06:15,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:06:15,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:15,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:15,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:15,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:15,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:15,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:15,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:15,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:06:16,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:16,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235661178] [2021-05-02 22:06:16,009 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:06:16,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712800395] [2021-05-02 22:06:16,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712800395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:06:16,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:06:16,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 22:06:16,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405925357] [2021-05-02 22:06:16,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:06:16,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:16,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:06:16,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:06:16,011 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:06:16,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:16,046 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-05-02 22:06:16,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:06:16,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 22:06:16,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:16,049 INFO L225 Difference]: With dead ends: 27 [2021-05-02 22:06:16,049 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 22:06:16,051 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:06:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 22:06:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 22:06:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:06:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-02 22:06:16,056 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-02 22:06:16,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:16,057 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-02 22:06:16,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:06:16,057 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-02 22:06:16,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 22:06:16,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:16,057 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:16,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:06:16,261 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:16,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:16,262 INFO L82 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2021-05-02 22:06:16,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:16,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709959498] [2021-05-02 22:06:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:16,269 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:16,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203648794] [2021-05-02 22:06:16,270 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 22:06:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:16,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:06:16,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:06:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:06:16,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:16,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709959498] [2021-05-02 22:06:16,422 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:06:16,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203648794] [2021-05-02 22:06:16,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203648794] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:06:16,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:06:16,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:06:16,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236767253] [2021-05-02 22:06:16,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:06:16,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:16,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:06:16,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:06:16,425 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:06:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:16,487 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 22:06:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:06:16,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 22:06:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:16,489 INFO L225 Difference]: With dead ends: 34 [2021-05-02 22:06:16,489 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 22:06:16,490 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:06:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 22:06:16,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 22:06:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:06:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-02 22:06:16,498 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-02 22:06:16,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:16,498 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-02 22:06:16,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:06:16,498 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-02 22:06:16,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 22:06:16,499 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:16,499 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:16,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:06:16,713 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:16,714 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-02 22:06:16,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:16,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113431564] [2021-05-02 22:06:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:16,722 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:16,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760186883] [2021-05-02 22:06:16,723 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 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 22:06:16,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:06:16,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:06:16,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 22:06:16,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:06:16,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:16,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:16,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:16,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:16,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:16,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:16,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:16,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:16,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:16,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:16,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:06:16,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:16,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113431564] [2021-05-02 22:06:16,893 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:06:16,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760186883] [2021-05-02 22:06:16,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760186883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:06:16,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:06:16,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:06:16,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555312181] [2021-05-02 22:06:16,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:06:16,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:16,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:06:16,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:06:16,895 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:06:16,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:16,927 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-05-02 22:06:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:06:16,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 22:06:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:16,928 INFO L225 Difference]: With dead ends: 35 [2021-05-02 22:06:16,928 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 22:06:16,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:06:16,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 22:06:16,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 22:06:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:06:16,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-02 22:06:16,931 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-02 22:06:16,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:16,931 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-02 22:06:16,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:06:16,932 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-02 22:06:16,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 22:06:16,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:16,932 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:17,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 22:06:17,149 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:17,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:17,150 INFO L82 PathProgramCache]: Analyzing trace with hash -869871361, now seen corresponding path program 2 times [2021-05-02 22:06:17,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:17,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139452621] [2021-05-02 22:06:17,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:17,157 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:17,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030216973] [2021-05-02 22:06:17,157 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 22:06:17,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:06:17,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:06:17,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 22:06:17,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:06:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 22:06:17,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:17,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139452621] [2021-05-02 22:06:17,372 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:06:17,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030216973] [2021-05-02 22:06:17,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030216973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:06:17,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:06:17,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:06:17,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886173515] [2021-05-02 22:06:17,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:06:17,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:17,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:06:17,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:06:17,377 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:06:17,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:17,463 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-05-02 22:06:17,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:06:17,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 22:06:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:17,465 INFO L225 Difference]: With dead ends: 42 [2021-05-02 22:06:17,465 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 22:06:17,465 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:06:17,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 22:06:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-02 22:06:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:06:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-02 22:06:17,468 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-02 22:06:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:17,468 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-02 22:06:17,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:06:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-02 22:06:17,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 22:06:17,469 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:17,469 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:17,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:06:17,672 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:17,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:17,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2080181988, now seen corresponding path program 3 times [2021-05-02 22:06:17,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:17,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601768451] [2021-05-02 22:06:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:17,681 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:17,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204344076] [2021-05-02 22:06:17,682 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