/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/loops-crafted-1/sumt3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:54:25,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:54:25,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:54:25,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:54:25,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:54:25,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:54:25,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:54:25,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:54:25,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:54:25,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:54:25,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:54:25,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:54:25,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:54:25,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:54:25,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:54:25,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:54:25,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:54:25,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:54:25,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:54:25,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:54:25,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:54:25,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:54:25,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:54:25,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:54:25,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:54:25,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:54:25,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:54:25,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:54:25,690 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:54:25,698 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:54:25,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:54:25,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:54:25,699 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:54:25,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:54:25,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:54:25,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:54:25,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:54:25,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:54:25,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:54:25,700 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:54:25,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:54:25,701 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:54:25,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:54:25,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:54:25,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:54:25,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:54:25,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:54:25,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:54:25,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:54:25,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:54:25,703 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:54:25,703 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:54:26,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:54:26,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:54:26,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:54:26,064 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:54:26,066 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:54:26,067 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt3.c [2021-05-02 18:54:26,143 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/944fb5c68/b86826fe6dc24181aa494e80195c168d/FLAG8a6170b1e [2021-05-02 18:54:26,546 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:54:26,547 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt3.c [2021-05-02 18:54:26,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/944fb5c68/b86826fe6dc24181aa494e80195c168d/FLAG8a6170b1e [2021-05-02 18:54:26,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/944fb5c68/b86826fe6dc24181aa494e80195c168d [2021-05-02 18:54:26,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:54:26,577 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:54:26,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:54:26,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:54:26,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:54:26,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:54:26" (1/1) ... [2021-05-02 18:54:26,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65b2cb5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:26, skipping insertion in model container [2021-05-02 18:54:26,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:54:26" (1/1) ... [2021-05-02 18:54:26,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:54:26,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:54:26,714 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt3.c[403,416] [2021-05-02 18:54:26,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:54:26,731 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:54:26,780 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt3.c[403,416] [2021-05-02 18:54:26,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:54:26,807 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:54:26,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:26 WrapperNode [2021-05-02 18:54:26,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:54:26,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:54:26,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:54:26,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:54:26,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:26" (1/1) ... [2021-05-02 18:54:26,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:26" (1/1) ... [2021-05-02 18:54:26,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:26" (1/1) ... [2021-05-02 18:54:26,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:26" (1/1) ... [2021-05-02 18:54:26,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:26" (1/1) ... [2021-05-02 18:54:26,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:26" (1/1) ... [2021-05-02 18:54:26,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:26" (1/1) ... [2021-05-02 18:54:26,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:54:26,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:54:26,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:54:26,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:54:26,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:54:27,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:54:27,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:54:27,003 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:54:27,009 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:54:27,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:54:27,016 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:54:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:54:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:54:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:54:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:54:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:54:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:54:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 18:54:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:54:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:54:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:54:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:54:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:54:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:54:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:54:27,320 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:54:27,320 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 18:54:27,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:54:27 BoogieIcfgContainer [2021-05-02 18:54:27,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:54:27,334 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:54:27,334 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:54:27,335 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:54:27,337 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:54:27" (1/1) ... [2021-05-02 18:54:27,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:54:27 BasicIcfg [2021-05-02 18:54:27,365 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:54:27,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:54:27,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:54:27,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:54:27,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:54:26" (1/4) ... [2021-05-02 18:54:27,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec89520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:54:27, skipping insertion in model container [2021-05-02 18:54:27,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:26" (2/4) ... [2021-05-02 18:54:27,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec89520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:54:27, skipping insertion in model container [2021-05-02 18:54:27,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:54:27" (3/4) ... [2021-05-02 18:54:27,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec89520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:54:27, skipping insertion in model container [2021-05-02 18:54:27,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:54:27" (4/4) ... [2021-05-02 18:54:27,370 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt3.cJordan [2021-05-02 18:54:27,374 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:54:27,379 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:54:27,391 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:54:27,405 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:54:27,405 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:54:27,405 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:54:27,405 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:54:27,406 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:54:27,406 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:54:27,406 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:54:27,406 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:54:27,416 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:54:27,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 18:54:27,421 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:27,422 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:27,422 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:27,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:27,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1944242814, now seen corresponding path program 1 times [2021-05-02 18:54:27,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:27,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548277392] [2021-05-02 18:54:27,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:27,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:27,661 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 18:54:27,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:27,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548277392] [2021-05-02 18:54:27,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548277392] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:54:27,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:54:27,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:54:27,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133759505] [2021-05-02 18:54:27,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:54:27,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:27,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:54:27,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:54:27,679 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:27,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:27,729 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-05-02 18:54:27,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:54:27,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 18:54:27,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:27,737 INFO L225 Difference]: With dead ends: 23 [2021-05-02 18:54:27,738 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 18:54:27,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:54:27,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 18:54:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 18:54:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-05-02 18:54:27,765 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2021-05-02 18:54:27,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:27,765 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-05-02 18:54:27,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:27,766 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-05-02 18:54:27,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 18:54:27,766 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:27,766 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:27,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:54:27,767 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:27,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:27,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1943319293, now seen corresponding path program 1 times [2021-05-02 18:54:27,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:27,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956082405] [2021-05-02 18:54:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:28,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:28,041 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 18:54:28,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:28,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956082405] [2021-05-02 18:54:28,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956082405] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:54:28,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:54:28,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 18:54:28,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662455012] [2021-05-02 18:54:28,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:54:28,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:28,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:54:28,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:54:28,044 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:28,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:28,198 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-05-02 18:54:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 18:54:28,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 18:54:28,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:28,200 INFO L225 Difference]: With dead ends: 21 [2021-05-02 18:54:28,200 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 18:54:28,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 18:54:28,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 18:54:28,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-02 18:54:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-02 18:54:28,203 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2021-05-02 18:54:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:28,204 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-02 18:54:28,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-02 18:54:28,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 18:54:28,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:28,204 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:28,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:54:28,205 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:28,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:28,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1088614638, now seen corresponding path program 1 times [2021-05-02 18:54:28,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:28,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040003169] [2021-05-02 18:54:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:28,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:28,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:28,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040003169] [2021-05-02 18:54:28,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040003169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:28,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056162722] [2021-05-02 18:54:28,437 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 18:54:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:28,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 18:54:28,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:28,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056162722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:28,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:28,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2021-05-02 18:54:28,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676305835] [2021-05-02 18:54:28,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 18:54:28,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:28,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 18:54:28,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:54:28,561 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:28,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:28,799 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-05-02 18:54:28,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:54:28,800 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 18:54:28,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:28,800 INFO L225 Difference]: With dead ends: 25 [2021-05-02 18:54:28,800 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 18:54:28,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 353.9ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-05-02 18:54:28,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 18:54:28,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 18:54:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-05-02 18:54:28,803 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2021-05-02 18:54:28,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:28,803 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-05-02 18:54:28,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:28,803 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-05-02 18:54:28,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 18:54:28,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:28,804 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:29,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 18:54:29,022 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:29,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:29,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1075471245, now seen corresponding path program 1 times [2021-05-02 18:54:29,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:29,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867856251] [2021-05-02 18:54:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:29,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:29,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:29,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867856251] [2021-05-02 18:54:29,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867856251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:29,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884918727] [2021-05-02 18:54:29,248 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 18:54:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:29,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 18:54:29,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:29,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884918727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:29,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:29,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-05-02 18:54:29,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247300014] [2021-05-02 18:54:29,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 18:54:29,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:29,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 18:54:29,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-02 18:54:29,386 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:29,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:29,807 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-05-02 18:54:29,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 18:54:29,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 18:54:29,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:29,809 INFO L225 Difference]: With dead ends: 29 [2021-05-02 18:54:29,809 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 18:54:29,809 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 537.1ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-05-02 18:54:29,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 18:54:29,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 18:54:29,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-05-02 18:54:29,811 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2021-05-02 18:54:29,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:29,812 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-05-02 18:54:29,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:29,812 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-05-02 18:54:29,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 18:54:29,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:29,812 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:30,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:54:30,028 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:30,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:30,029 INFO L82 PathProgramCache]: Analyzing trace with hash -433900693, now seen corresponding path program 1 times [2021-05-02 18:54:30,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:30,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999108397] [2021-05-02 18:54:30,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:30,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:30,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:30,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999108397] [2021-05-02 18:54:30,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999108397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:30,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143130191] [2021-05-02 18:54:30,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:54:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:30,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 18:54:30,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:30,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143130191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:30,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:30,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-05-02 18:54:30,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681093245] [2021-05-02 18:54:30,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 18:54:30,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:30,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 18:54:30,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-05-02 18:54:30,515 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:31,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:31,048 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-05-02 18:54:31,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 18:54:31,049 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 18:54:31,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:31,049 INFO L225 Difference]: With dead ends: 32 [2021-05-02 18:54:31,049 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 18:54:31,050 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 698.1ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-05-02 18:54:31,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 18:54:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 18:54:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:31,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-02 18:54:31,052 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2021-05-02 18:54:31,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:31,053 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-02 18:54:31,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:31,053 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-02 18:54:31,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 18:54:31,053 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:31,053 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:31,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:54:31,269 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:31,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:31,269 INFO L82 PathProgramCache]: Analyzing trace with hash -129461882, now seen corresponding path program 2 times [2021-05-02 18:54:31,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:31,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686634064] [2021-05-02 18:54:31,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:31,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:31,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:31,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686634064] [2021-05-02 18:54:31,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686634064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:31,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808757030] [2021-05-02 18:54:31,669 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 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 18:54:31,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:54:31,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:54:31,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 18:54:31,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:32,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:32,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:32,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:32,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:32,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:32,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:32,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808757030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:32,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:32,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-05-02 18:54:32,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743847453] [2021-05-02 18:54:32,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 18:54:32,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:32,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 18:54:32,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-05-02 18:54:32,308 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 26 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:33,004 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-05-02 18:54:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 18:54:33,005 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-02 18:54:33,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:33,005 INFO L225 Difference]: With dead ends: 41 [2021-05-02 18:54:33,005 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 18:54:33,006 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1088.9ms TimeCoverageRelationStatistics Valid=177, Invalid=1383, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 18:54:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 18:54:33,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-05-02 18:54:33,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:33,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-02 18:54:33,009 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 26 [2021-05-02 18:54:33,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:33,009 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-02 18:54:33,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:33,009 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-02 18:54:33,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 18:54:33,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:33,010 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:33,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:54:33,215 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash -280860307, now seen corresponding path program 3 times [2021-05-02 18:54:33,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:33,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857084785] [2021-05-02 18:54:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:33,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:33,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:33,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857084785] [2021-05-02 18:54:33,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857084785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:33,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554261075] [2021-05-02 18:54:33,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true