/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/hard-u_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:56:47,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:56:47,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:56:47,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 20:56:47,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:56:47,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:56:47,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:56:47,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:56:47,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:56:47,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:56:47,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:56:47,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:56:47,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:56:47,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:56:47,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:56:47,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:56:47,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:56:47,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:56:47,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:56:47,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:56:47,935 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:56:47,945 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:56:47,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:56:47,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:56:47,947 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:56:47,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:56:47,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:56:47,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:56:47,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:56:47,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:56:47,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:56:47,949 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:56:47,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:56:47,949 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:56:47,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:56:47,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:56:47,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:56:47,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:56:47,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:56:47,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:56:47,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:56:47,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:56:47,950 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:56:47,951 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:56:48,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:56:48,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:56:48,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:56:48,184 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:56:48,185 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:56:48,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound10.c [2021-05-02 20:56:48,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc097db14/e16d3dcac9c14789886e24522e9d3edf/FLAG14e9ec020 [2021-05-02 20:56:48,662 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:56:48,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound10.c [2021-05-02 20:56:48,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc097db14/e16d3dcac9c14789886e24522e9d3edf/FLAG14e9ec020 [2021-05-02 20:56:48,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc097db14/e16d3dcac9c14789886e24522e9d3edf [2021-05-02 20:56:48,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:56:48,691 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:56:48,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:56:48,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:56:48,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:56:48,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:56:48" (1/1) ... [2021-05-02 20:56:48,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8038493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:48, skipping insertion in model container [2021-05-02 20:56:48,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:56:48" (1/1) ... [2021-05-02 20:56:48,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:56:48,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:56:48,841 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/hard-u_unwindbound10.c[545,558] [2021-05-02 20:56:48,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:56:48,859 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:56:48,869 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/hard-u_unwindbound10.c[545,558] [2021-05-02 20:56:48,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:56:48,885 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:56:48,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:48 WrapperNode [2021-05-02 20:56:48,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:56:48,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:56:48,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:56:48,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:56:48,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:48" (1/1) ... [2021-05-02 20:56:48,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:48" (1/1) ... [2021-05-02 20:56:48,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:48" (1/1) ... [2021-05-02 20:56:48,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:48" (1/1) ... [2021-05-02 20:56:48,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:48" (1/1) ... [2021-05-02 20:56:48,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:48" (1/1) ... [2021-05-02 20:56:48,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:48" (1/1) ... [2021-05-02 20:56:48,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:56:48,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:56:48,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:56:48,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:56:48,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:56:49,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:56:49,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:56:49,076 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:56:49,077 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:56:49,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:56:49,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:56:49,077 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:56:49,077 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:56:49,077 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:56:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:56:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:56:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:56:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:56:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:56:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:56:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:56:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:56:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:56:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:56:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:56:49,292 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:56:49,292 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:56:49,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:56:49 BoogieIcfgContainer [2021-05-02 20:56:49,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:56:49,294 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:56:49,294 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:56:49,294 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:56:49,296 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:56:49" (1/1) ... [2021-05-02 20:56:49,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:56:49 BasicIcfg [2021-05-02 20:56:49,321 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:56:49,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:56:49,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:56:49,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:56:49,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:56:48" (1/4) ... [2021-05-02 20:56:49,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf3458e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:56:49, skipping insertion in model container [2021-05-02 20:56:49,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:48" (2/4) ... [2021-05-02 20:56:49,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf3458e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:56:49, skipping insertion in model container [2021-05-02 20:56:49,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:56:49" (3/4) ... [2021-05-02 20:56:49,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf3458e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:56:49, skipping insertion in model container [2021-05-02 20:56:49,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:56:49" (4/4) ... [2021-05-02 20:56:49,325 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound10.cJordan [2021-05-02 20:56:49,329 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:56:49,331 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:56:49,342 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:56:49,356 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:56:49,356 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:56:49,356 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:56:49,356 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:56:49,356 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:56:49,356 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:56:49,357 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:56:49,357 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:56:49,367 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:56:49,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:56:49,373 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:49,373 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:49,374 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:49,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:49,378 INFO L82 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2021-05-02 20:56:49,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:49,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40975852] [2021-05-02 20:56:49,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:49,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:56:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:49,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:56:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:49,584 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 20:56:49,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:49,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40975852] [2021-05-02 20:56:49,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40975852] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:49,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:49,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:56:49,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922977892] [2021-05-02 20:56:49,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:56:49,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:49,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:56:49,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:56:49,600 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:56:49,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:49,710 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 20:56:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:56:49,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 20:56:49,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:49,717 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:56:49,717 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:56:49,718 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:56:49,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:56:49,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 20:56:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:56:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 20:56:49,739 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-02 20:56:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:49,739 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 20:56:49,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:56:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 20:56:49,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:56:49,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:49,740 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:49,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:56:49,740 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:49,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:49,740 INFO L82 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2021-05-02 20:56:49,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:49,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374033277] [2021-05-02 20:56:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:49,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:56:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:49,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:56:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:49,821 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 20:56:49,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:49,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374033277] [2021-05-02 20:56:49,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374033277] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:49,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:49,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:56:49,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838055805] [2021-05-02 20:56:49,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:56:49,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:49,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:56:49,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:56:49,823 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:56:50,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:50,044 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-05-02 20:56:50,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:56:50,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 20:56:50,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:50,046 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:56:50,046 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 20:56:50,047 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:56:50,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 20:56:50,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-02 20:56:50,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:56:50,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 20:56:50,062 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-02 20:56:50,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:50,062 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 20:56:50,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:56:50,062 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 20:56:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:56:50,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:50,064 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:50,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:56:50,066 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:50,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:50,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2021-05-02 20:56:50,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:50,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924749103] [2021-05-02 20:56:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:50,080 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:50,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347436865] [2021-05-02 20:56:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:50,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:56:50,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:50,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,233 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 20:56:50,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:50,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924749103] [2021-05-02 20:56:50,234 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:50,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347436865] [2021-05-02 20:56:50,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347436865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:50,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:50,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:56:50,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001650431] [2021-05-02 20:56:50,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:56:50,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:50,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:56:50,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:56:50,235 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:56:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:50,243 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-05-02 20:56:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:56:50,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 20:56:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:50,244 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:56:50,244 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 20:56:50,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:56:50,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 20:56:50,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 20:56:50,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:56:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-02 20:56:50,247 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-02 20:56:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:50,247 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-02 20:56:50,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:56:50,247 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-02 20:56:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:56:50,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:50,248 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:50,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 20:56:50,461 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:50,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:50,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2021-05-02 20:56:50,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:50,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436173223] [2021-05-02 20:56:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:50,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:56:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:50,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:56:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:50,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 20:56:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:56:50,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:50,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436173223] [2021-05-02 20:56:50,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436173223] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:50,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:50,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:56:50,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120029524] [2021-05-02 20:56:50,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:56:50,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:50,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:56:50,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:56:50,569 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:56:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:50,809 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-05-02 20:56:50,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:56:50,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:56:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:50,811 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:56:50,811 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 20:56:50,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:56:50,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 20:56:50,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-02 20:56:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 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 20:56:50,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 20:56:50,819 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-02 20:56:50,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:50,819 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 20:56:50,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:56:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 20:56:50,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:56:50,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:50,820 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:50,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 20:56:50,821 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:50,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:50,821 INFO L82 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2021-05-02 20:56:50,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:50,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125797089] [2021-05-02 20:56:50,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:50,847 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:50,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296447280] [2021-05-02 20:56:50,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:50,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:56:50,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:50,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:56:51,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:51,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125797089] [2021-05-02 20:56:51,081 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:51,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296447280] [2021-05-02 20:56:51,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296447280] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:51,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:51,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 20:56:51,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867194112] [2021-05-02 20:56:51,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:56:51,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:51,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:56:51,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:56:51,083 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:56:51,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:51,173 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-05-02 20:56:51,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:56:51,175 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 20:56:51,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:51,175 INFO L225 Difference]: With dead ends: 57 [2021-05-02 20:56:51,176 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 20:56:51,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:56:51,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 20:56:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 20:56:51,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:56:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-05-02 20:56:51,179 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2021-05-02 20:56:51,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:51,179 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-05-02 20:56:51,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:56:51,180 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-05-02 20:56:51,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:56:51,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:51,180 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:51,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:51,396 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:51,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:51,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2021-05-02 20:56:51,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:51,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944941870] [2021-05-02 20:56:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:51,410 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:51,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646146675] [2021-05-02 20:56:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:51,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:56:51,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:51,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:56:51,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:51,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944941870] [2021-05-02 20:56:51,582 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:51,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646146675] [2021-05-02 20:56:51,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646146675] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:51,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:51,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:56:51,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570533970] [2021-05-02 20:56:51,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:56:51,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:51,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:56:51,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:56:51,583 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:56:51,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:51,607 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-02 20:56:51,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:56:51,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 20:56:51,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:51,608 INFO L225 Difference]: With dead ends: 69 [2021-05-02 20:56:51,608 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 20:56:51,609 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:56:51,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 20:56:51,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 20:56:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:56:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 20:56:51,612 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-02 20:56:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:51,612 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 20:56:51,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:56:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 20:56:51,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:56:51,613 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:51,613 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:51,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:51,830 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:51,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:51,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2021-05-02 20:56:51,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:51,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646369474] [2021-05-02 20:56:51,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:51,838 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:51,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026355395] [2021-05-02 20:56:51,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:51,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:56:51,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:51,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:52,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:52,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:52,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:52,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:56:52,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:52,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646369474] [2021-05-02 20:56:52,060 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:52,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026355395] [2021-05-02 20:56:52,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026355395] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:52,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:52,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:56:52,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593349913] [2021-05-02 20:56:52,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:56:52,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:52,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:56:52,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:56:52,061 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:56:52,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:52,195 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-05-02 20:56:52,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:56:52,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 20:56:52,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:52,200 INFO L225 Difference]: With dead ends: 72 [2021-05-02 20:56:52,200 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:56:52,200 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:56:52,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:56:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 20:56:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:56:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 20:56:52,211 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-02 20:56:52,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:52,212 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 20:56:52,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:56:52,212 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 20:56:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:56:52,213 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:52,213 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:52,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:52,417 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2021-05-02 20:56:52,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:52,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433887854] [2021-05-02 20:56:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:52,431 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:52,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907303532] [2021-05-02 20:56:52,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:52,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:56:52,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:52,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:52,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:52,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:52,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:52,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:52,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:52,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:52,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:56:52,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:52,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433887854] [2021-05-02 20:56:52,548 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:52,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907303532] [2021-05-02 20:56:52,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907303532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:52,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:52,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:56:52,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991086946] [2021-05-02 20:56:52,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:56:52,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:52,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:56:52,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:56:52,549 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:56:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:52,574 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-05-02 20:56:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:56:52,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-02 20:56:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:52,575 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:56:52,575 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:56:52,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:56:52,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:56:52,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 20:56:52,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:56:52,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-02 20:56:52,578 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-02 20:56:52,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:52,578 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-02 20:56:52,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:56:52,578 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-02 20:56:52,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:56:52,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:52,579 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:52,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:52,781 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:52,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:52,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2021-05-02 20:56:52,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:52,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97965703] [2021-05-02 20:56:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:52,787 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:52,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476780403] [2021-05-02 20:56:52,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:52,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:56:52,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:53,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 20:56:53,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:53,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97965703] [2021-05-02 20:56:53,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:53,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476780403] [2021-05-02 20:56:53,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476780403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:53,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:53,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:56:53,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117868812] [2021-05-02 20:56:53,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:56:53,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:53,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:56:53,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:56:53,118 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:56:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:53,270 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2021-05-02 20:56:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:56:53,271 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-02 20:56:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:53,271 INFO L225 Difference]: With dead ends: 75 [2021-05-02 20:56:53,272 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 20:56:53,272 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:56:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 20:56:53,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-05-02 20:56:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 46 states have internal predecessors, (53), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 20:56:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2021-05-02 20:56:53,276 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 46 [2021-05-02 20:56:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:53,276 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2021-05-02 20:56:53,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:56:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2021-05-02 20:56:53,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:56:53,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:53,277 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:53,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:53,480 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:53,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:53,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2021-05-02 20:56:53,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:53,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985872612] [2021-05-02 20:56:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:53,498 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:53,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42139889] [2021-05-02 20:56:53,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:53,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:56:53,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:53,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:56:53,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:53,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985872612] [2021-05-02 20:56:53,634 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:53,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42139889] [2021-05-02 20:56:53,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42139889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:53,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:53,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:56:53,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801160997] [2021-05-02 20:56:53,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:56:53,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:53,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:56:53,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:56:53,637 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:56:53,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:53,670 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-05-02 20:56:53,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:56:53,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2021-05-02 20:56:53,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:53,673 INFO L225 Difference]: With dead ends: 86 [2021-05-02 20:56:53,673 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 20:56:53,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:56:53,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 20:56:53,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 20:56:53,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 55 states have internal predecessors, (61), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 20:56:53,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2021-05-02 20:56:53,686 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 54 [2021-05-02 20:56:53,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:53,686 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2021-05-02 20:56:53,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:56:53,686 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2021-05-02 20:56:53,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:56:53,688 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:53,688 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:53,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 20:56:53,903 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:53,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:53,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2021-05-02 20:56:53,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:53,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131340295] [2021-05-02 20:56:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:53,913 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:53,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036883030] [2021-05-02 20:56:53,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:54,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:56:54,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:54,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:54,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:54,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:54,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:54,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:54,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:54,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:54,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:54,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:54,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:54,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:54,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:54,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:54,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 20:56:54,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:54,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131340295] [2021-05-02 20:56:54,193 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:54,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036883030] [2021-05-02 20:56:54,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036883030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:54,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:54,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:56:54,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287638930] [2021-05-02 20:56:54,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:56:54,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:54,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:56:54,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:56:54,195 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:56:58,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:58,348 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2021-05-02 20:56:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:56:58,349 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-02 20:56:58,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:58,349 INFO L225 Difference]: With dead ends: 97 [2021-05-02 20:56:58,349 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 20:56:58,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:56:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 20:56:58,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-05-02 20:56:58,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 63 states have internal predecessors, (71), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:56:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2021-05-02 20:56:58,352 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 54 [2021-05-02 20:56:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:58,353 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2021-05-02 20:56:58,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:56:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2021-05-02 20:56:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:56:58,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:58,354 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:58,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 20:56:58,554 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:58,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:58,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1294763379, now seen corresponding path program 1 times [2021-05-02 20:56:58,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:58,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191493348] [2021-05-02 20:56:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:58,561 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:58,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684881432] [2021-05-02 20:56:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:58,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:56:58,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:58,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-02 20:56:58,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:58,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191493348] [2021-05-02 20:56:58,692 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:58,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684881432] [2021-05-02 20:56:58,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684881432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:58,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:58,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:56:58,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293447003] [2021-05-02 20:56:58,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:56:58,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:58,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:56:58,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:56:58,694 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:56:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:58,751 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2021-05-02 20:56:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:56:58,751 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-05-02 20:56:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:58,753 INFO L225 Difference]: With dead ends: 98 [2021-05-02 20:56:58,753 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 20:56:58,753 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:56:58,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 20:56:58,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-05-02 20:56:58,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 65 states have internal predecessors, (73), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:56:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2021-05-02 20:56:58,756 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 61 [2021-05-02 20:56:58,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:58,757 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2021-05-02 20:56:58,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:56:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2021-05-02 20:56:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 20:56:58,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:58,757 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:58,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:58,969 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:58,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1774996485, now seen corresponding path program 2 times [2021-05-02 20:56:58,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:58,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884998447] [2021-05-02 20:56:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:58,975 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:58,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487882070] [2021-05-02 20:56:58,975 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:59,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:56:59,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:56:59,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 20:56:59,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:59,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 43 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 20:56:59,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:59,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884998447] [2021-05-02 20:56:59,551 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:59,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487882070] [2021-05-02 20:56:59,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487882070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:59,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:59,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:56:59,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423624881] [2021-05-02 20:56:59,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:56:59,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:59,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:56:59,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:56:59,552 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:56:59,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:59,971 INFO L93 Difference]: Finished difference Result 113 states and 135 transitions. [2021-05-02 20:56:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:56:59,971 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2021-05-02 20:56:59,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:59,972 INFO L225 Difference]: With dead ends: 113 [2021-05-02 20:56:59,972 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 20:56:59,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:56:59,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 20:56:59,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-05-02 20:56:59,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 69 states have (on average 1.173913043478261) internal successors, (81), 72 states have internal predecessors, (81), 26 states have call successors, (26), 15 states have call predecessors, (26), 14 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:56:59,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2021-05-02 20:56:59,978 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 64 [2021-05-02 20:56:59,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:59,978 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2021-05-02 20:56:59,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:56:59,978 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2021-05-02 20:56:59,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 20:56:59,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:59,979 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:00,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:00,183 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:00,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:00,183 INFO L82 PathProgramCache]: Analyzing trace with hash 112143503, now seen corresponding path program 1 times [2021-05-02 20:57:00,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:00,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56160806] [2021-05-02 20:57:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:00,191 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:00,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645025264] [2021-05-02 20:57:00,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:00,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:57:00,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:00,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:57:00,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:00,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56160806] [2021-05-02 20:57:00,367 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:00,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645025264] [2021-05-02 20:57:00,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645025264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:57:00,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:57:00,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:57:00,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168626659] [2021-05-02 20:57:00,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:57:00,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:00,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:57:00,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:57:00,368 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:57:00,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:00,423 INFO L93 Difference]: Finished difference Result 133 states and 150 transitions. [2021-05-02 20:57:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:57:00,424 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2021-05-02 20:57:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:00,425 INFO L225 Difference]: With dead ends: 133 [2021-05-02 20:57:00,425 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 20:57:00,425 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:57:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 20:57:00,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-05-02 20:57:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 89 states have internal predecessors, (99), 26 states have call successors, (26), 19 states have call predecessors, (26), 18 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:57:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2021-05-02 20:57:00,429 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 68 [2021-05-02 20:57:00,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:00,429 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2021-05-02 20:57:00,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:57:00,430 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2021-05-02 20:57:00,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 20:57:00,430 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:00,430 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:00,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:57:00,645 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:00,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:00,645 INFO L82 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2021-05-02 20:57:00,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:00,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489555518] [2021-05-02 20:57:00,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:00,650 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:00,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408811119] [2021-05-02 20:57:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:01,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 20:57:01,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:01,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:07:47,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:07:47,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489555518] [2021-05-02 21:07:47,176 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:07:47,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408811119] [2021-05-02 21:07:47,176 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-02 21:07:47,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 21:07:47,377 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NegativeArraySizeException: -1072721305 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildDualFiniteJunction(DualJunctionTir.java:651) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildCorrespondingFiniteJunctionForAntiDer(DualJunctionTir.java:615) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildBoundConstraint(DualJunctionTir.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateConjuncts(DualJunctionTir.java:205) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne(DualJunctionTir.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryExhaustivelyToEliminate(DualJunctionTir.java:125) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminate(DualJunctionTir.java:112) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:465) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:609) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:405) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:465) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:609) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:405) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:612) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-02 21:07:47,381 INFO L168 Benchmark]: Toolchain (without parser) took 658689.81 ms. Allocated memory was 180.4 MB in the beginning and 6.3 GB in the end (delta: 6.1 GB). Free memory was 146.7 MB in the beginning and 5.0 GB in the end (delta: -4.8 GB). Peak memory consumption was 5.0 GB. Max. memory is 8.0 GB. [2021-05-02 21:07:47,381 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 180.4 MB. Free memory was 163.3 MB in the beginning and 163.2 MB in the end (delta: 106.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 21:07:47,381 INFO L168 Benchmark]: CACSL2BoogieTranslator took 191.17 ms. Allocated memory is still 180.4 MB. Free memory was 146.5 MB in the beginning and 136.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 21:07:47,381 INFO L168 Benchmark]: Boogie Preprocessor took 51.25 ms. Allocated memory is still 180.4 MB. Free memory was 136.5 MB in the beginning and 164.0 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2021-05-02 21:07:47,381 INFO L168 Benchmark]: RCFGBuilder took 354.94 ms. Allocated memory is still 180.4 MB. Free memory was 164.0 MB in the beginning and 147.8 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 21:07:47,381 INFO L168 Benchmark]: IcfgTransformer took 27.05 ms. Allocated memory is still 180.4 MB. Free memory was 147.8 MB in the beginning and 146.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 21:07:47,381 INFO L168 Benchmark]: TraceAbstraction took 658059.02 ms. Allocated memory was 180.4 MB in the beginning and 6.3 GB in the end (delta: 6.1 GB). Free memory was 145.7 MB in the beginning and 5.0 GB in the end (delta: -4.8 GB). Peak memory consumption was 5.0 GB. Max. memory is 8.0 GB. [2021-05-02 21:07:47,382 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 180.4 MB. Free memory was 163.3 MB in the beginning and 163.2 MB in the end (delta: 106.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 191.17 ms. Allocated memory is still 180.4 MB. Free memory was 146.5 MB in the beginning and 136.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 51.25 ms. Allocated memory is still 180.4 MB. Free memory was 136.5 MB in the beginning and 164.0 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 354.94 ms. Allocated memory is still 180.4 MB. Free memory was 164.0 MB in the beginning and 147.8 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 27.05 ms. Allocated memory is still 180.4 MB. Free memory was 147.8 MB in the beginning and 146.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 658059.02 ms. Allocated memory was 180.4 MB in the beginning and 6.3 GB in the end (delta: 6.1 GB). Free memory was 145.7 MB in the beginning and 5.0 GB in the end (delta: -4.8 GB). Peak memory consumption was 5.0 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NegativeArraySizeException: -1072721305 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NegativeArraySizeException: -1072721305: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildDualFiniteJunction(DualJunctionTir.java:651) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...