/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_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:01:46,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:01:46,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:01:46,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:01:46,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:01:46,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:01:46,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:01:46,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:01:46,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:01:46,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:01:46,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:01:46,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 21:01:46,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:01:46,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:01:46,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:01:46,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:01:46,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:01:46,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:01:46,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:01:46,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:01:46,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:01:46,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:01:46,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:01:46,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:01:46,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:01:46,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:01:46,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:01:46,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:01:46,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:01:46,593 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:01:46,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:01:46,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:01:46,595 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:01:46,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:01:46,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:01:46,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:01:46,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:01:46,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:01:46,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:01:46,596 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:01:46,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:01:46,596 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:01:46,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:01:46,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:01:46,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:01:46,597 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:01:46,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:01:46,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:01:46,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:01:46,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:01:46,598 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:01:46,598 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:01:46,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:01:46,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:01:46,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:01:46,925 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:01:46,926 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:01:46,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound50.c [2021-05-02 21:01:46,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/969841739/8370b39540804bb4a998a2f3628fb068/FLAG413ab7293 [2021-05-02 21:01:47,404 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:01:47,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound50.c [2021-05-02 21:01:47,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/969841739/8370b39540804bb4a998a2f3628fb068/FLAG413ab7293 [2021-05-02 21:01:47,822 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/969841739/8370b39540804bb4a998a2f3628fb068 [2021-05-02 21:01:47,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:01:47,826 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:01:47,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:01:47,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:01:47,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:01:47,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:01:47" (1/1) ... [2021-05-02 21:01:47,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a5f7819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:01:47, skipping insertion in model container [2021-05-02 21:01:47,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:01:47" (1/1) ... [2021-05-02 21:01:47,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:01:47,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:01:47,959 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_valuebound50.c[545,558] [2021-05-02 21:01:47,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:01:47,982 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:01:47,994 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_valuebound50.c[545,558] [2021-05-02 21:01:48,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:01:48,013 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:01:48,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:01:48 WrapperNode [2021-05-02 21:01:48,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:01:48,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:01:48,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:01:48,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:01:48,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:01:48" (1/1) ... [2021-05-02 21:01:48,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:01:48" (1/1) ... [2021-05-02 21:01:48,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:01:48" (1/1) ... [2021-05-02 21:01:48,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:01:48" (1/1) ... [2021-05-02 21:01:48,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:01:48" (1/1) ... [2021-05-02 21:01:48,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:01:48" (1/1) ... [2021-05-02 21:01:48,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:01:48" (1/1) ... [2021-05-02 21:01:48,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:01:48,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:01:48,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:01:48,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:01:48,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:01:48" (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 21:01:48,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:01:48,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:01:48,171 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:01:48,171 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:01:48,171 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:01:48,171 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:01:48,171 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:01:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:01:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:01:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:01:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 21:01:48,173 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:01:48,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:01:48,173 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:01:48,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:01:48,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:01:48,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:01:48,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:01:48,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:01:48,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:01:48,526 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:01:48,527 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 21:01:48,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:01:48 BoogieIcfgContainer [2021-05-02 21:01:48,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:01:48,545 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:01:48,545 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:01:48,546 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:01:48,548 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:01:48" (1/1) ... [2021-05-02 21:01:48,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:01:48 BasicIcfg [2021-05-02 21:01:48,567 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:01:48,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:01:48,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:01:48,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:01:48,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:01:47" (1/4) ... [2021-05-02 21:01:48,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9ba13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:01:48, skipping insertion in model container [2021-05-02 21:01:48,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:01:48" (2/4) ... [2021-05-02 21:01:48,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9ba13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:01:48, skipping insertion in model container [2021-05-02 21:01:48,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:01:48" (3/4) ... [2021-05-02 21:01:48,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9ba13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:01:48, skipping insertion in model container [2021-05-02 21:01:48,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:01:48" (4/4) ... [2021-05-02 21:01:48,573 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound50.cJordan [2021-05-02 21:01:48,581 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:01:48,585 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:01:48,599 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:01:48,629 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:01:48,629 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:01:48,629 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:01:48,629 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:01:48,629 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:01:48,629 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:01:48,630 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:01:48,630 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:01:48,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 21:01:48,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:01:48,656 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:01:48,657 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:01:48,657 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:01:48,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:01:48,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-02 21:01:48,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:01:48,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654678540] [2021-05-02 21:01:48,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:01:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:48,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:01:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:48,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:01:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:48,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 21:01:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:48,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 21:01:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 21:01:48,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:01:48,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654678540] [2021-05-02 21:01:48,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654678540] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:01:48,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:01:48,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:01:48,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405333351] [2021-05-02 21:01:48,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:01:48,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:01:49,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:01:49,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:01:49,010 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 21:01:49,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:01:49,155 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 21:01:49,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:01:49,157 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 21:01:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:01:49,163 INFO L225 Difference]: With dead ends: 38 [2021-05-02 21:01:49,163 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 21:01:49,165 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:01:49,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 21:01:49,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 21:01:49,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 21:01:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 21:01:49,200 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 21:01:49,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:01:49,201 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 21:01:49,201 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 21:01:49,201 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 21:01:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:01:49,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:01:49,203 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:01:49,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:01:49,203 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:01:49,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:01:49,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-02 21:01:49,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:01:49,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490358737] [2021-05-02 21:01:49,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:01:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:49,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:01:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:49,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:01:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:49,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 21:01:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:49,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 21:01:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 21:01:49,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:01:49,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490358737] [2021-05-02 21:01:49,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490358737] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:01:49,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:01:49,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 21:01:49,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158870515] [2021-05-02 21:01:49,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 21:01:49,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:01:49,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 21:01:49,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:01:49,321 INFO L87 Difference]: Start difference. First operand 33 states and 43 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 21:01:49,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:01:49,664 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-02 21:01:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 21:01:49,665 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-02 21:01:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:01:49,666 INFO L225 Difference]: With dead ends: 44 [2021-05-02 21:01:49,667 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 21:01:49,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:01:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 21:01:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 21:01:49,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 21:01:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 21:01:49,676 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 21:01:49,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:01:49,677 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 21:01:49,677 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 21:01:49,677 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 21:01:49,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 21:01:49,678 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:01:49,678 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:01:49,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 21:01:49,678 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:01:49,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:01:49,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-02 21:01:49,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:01:49,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510806865] [2021-05-02 21:01:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:01:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:49,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:01:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:49,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:01:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:49,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 21:01:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:49,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 21:01:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:49,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 21:01:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 21:01:49,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:01:49,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510806865] [2021-05-02 21:01:49,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510806865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:01:49,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:01:49,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 21:01:49,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221675506] [2021-05-02 21:01:49,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 21:01:49,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:01:49,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 21:01:49,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:01:49,975 INFO L87 Difference]: Start difference. First operand 37 states and 46 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 21:01:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:01:50,350 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 21:01:50,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 21:01:50,350 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 21:01:50,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:01:50,354 INFO L225 Difference]: With dead ends: 48 [2021-05-02 21:01:50,354 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 21:01:50,355 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:01:50,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 21:01:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 21:01:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 21:01:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 21:01:50,376 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 21:01:50,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:01:50,377 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 21:01:50,377 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 21:01:50,378 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 21:01:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 21:01:50,378 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:01:50,379 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:01:50,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 21:01:50,379 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:01:50,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:01:50,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-02 21:01:50,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:01:50,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777402159] [2021-05-02 21:01:50,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:01:50,400 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:01:50,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648047824] [2021-05-02 21:01:50,401 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 21:01:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:50,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 21:01:50,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:01:50,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:50,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:50,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:50,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:50,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:50,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:50,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 21:01:50,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:01:50,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777402159] [2021-05-02 21:01:50,770 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:01:50,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648047824] [2021-05-02 21:01:50,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648047824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:01:50,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:01:50,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 21:01:50,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285502014] [2021-05-02 21:01:50,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:01:50,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:01:50,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:01:50,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:01:50,773 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 21:01:50,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:01:50,898 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-05-02 21:01:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:01:50,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-02 21:01:50,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:01:50,901 INFO L225 Difference]: With dead ends: 56 [2021-05-02 21:01:50,901 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 21:01:50,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:01:50,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 21:01:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 21:01:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 21:01:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 21:01:50,913 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-02 21:01:50,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:01:50,913 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 21:01:50,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 21:01:50,914 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 21:01:50,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 21:01:50,916 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:01:50,916 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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 21:01:51,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:01:51,136 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:01:51,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:01:51,136 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-02 21:01:51,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:01:51,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111339067] [2021-05-02 21:01:51,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:01:51,146 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:01:51,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896776858] [2021-05-02 21:01:51,146 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 21:01:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:51,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 21:01:51,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:01:51,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 21:01:51,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:01:51,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111339067] [2021-05-02 21:01:51,359 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:01:51,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896776858] [2021-05-02 21:01:51,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896776858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:01:51,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:01:51,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 21:01:51,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258827408] [2021-05-02 21:01:51,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:01:51,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:01:51,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:01:51,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:01:51,362 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 21:01:51,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:01:51,475 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2021-05-02 21:01:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:01:51,475 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 21:01:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:01:51,479 INFO L225 Difference]: With dead ends: 66 [2021-05-02 21:01:51,479 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 21:01:51,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:01:51,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 21:01:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-05-02 21:01:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 21:01:51,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-05-02 21:01:51,491 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 45 [2021-05-02 21:01:51,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:01:51,491 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-05-02 21:01:51,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 21:01:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-05-02 21:01:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 21:01:51,495 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:01:51,496 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:01:51,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:01:51,717 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:01:51,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:01:51,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-02 21:01:51,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:01:51,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484083227] [2021-05-02 21:01:51,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:01:51,729 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:01:51,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246728194] [2021-05-02 21:01:51,729 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 21:01:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:51,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 21:01:51,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:01:51,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:51,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:52,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:52,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:52,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:52,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:52,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:52,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:52,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:52,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:52,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:52,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:52,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:52,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 21:01:52,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:01:52,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484083227] [2021-05-02 21:01:52,160 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:01:52,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246728194] [2021-05-02 21:01:52,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246728194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:01:52,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:01:52,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 21:01:52,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327741239] [2021-05-02 21:01:52,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 21:01:52,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:01:52,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 21:01:52,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 21:01:52,162 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 21:01:52,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:01:52,428 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2021-05-02 21:01:52,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 21:01:52,429 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2021-05-02 21:01:52,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:01:52,431 INFO L225 Difference]: With dead ends: 73 [2021-05-02 21:01:52,432 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 21:01:52,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 21:01:52,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 21:01:52,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 21:01:52,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 41 states have (on average 1.170731707317073) internal successors, (48), 43 states have internal predecessors, (48), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 21:01:52,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2021-05-02 21:01:52,438 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 55 [2021-05-02 21:01:52,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:01:52,438 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2021-05-02 21:01:52,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 21:01:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2021-05-02 21:01:52,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 21:01:52,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:01:52,440 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:01:52,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:01:52,646 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:01:52,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:01:52,647 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-02 21:01:52,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:01:52,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476976631] [2021-05-02 21:01:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:01:52,657 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:01:52,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639872682] [2021-05-02 21:01:52,657 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 21:01:53,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:01:53,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:01:53,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 21:01:53,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:01:53,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-05-02 21:01:53,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:01:53,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476976631] [2021-05-02 21:01:53,393 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:01:53,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639872682] [2021-05-02 21:01:53,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639872682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:01:53,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:01:53,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 21:01:53,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410252941] [2021-05-02 21:01:53,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 21:01:53,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:01:53,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 21:01:53,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:01:53,397 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-02 21:01:53,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:01:53,908 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2021-05-02 21:01:53,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 21:01:53,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 72 [2021-05-02 21:01:53,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:01:53,910 INFO L225 Difference]: With dead ends: 86 [2021-05-02 21:01:53,910 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 21:01:53,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 21:01:53,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 21:01:53,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 21:01:53,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 50 states have internal predecessors, (55), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 21:01:53,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2021-05-02 21:01:53,917 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 72 [2021-05-02 21:01:53,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:01:53,917 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2021-05-02 21:01:53,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-02 21:01:53,918 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2021-05-02 21:01:53,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 21:01:53,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:01:53,919 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:01:54,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:01:54,126 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:01:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:01:54,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2021-05-02 21:01:54,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:01:54,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043123537] [2021-05-02 21:01:54,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:01:54,133 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:01:54,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429284607] [2021-05-02 21:01:54,133 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 21:01:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:01:54,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 21:01:54,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:01:54,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:54,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:55,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:03:10,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:03:11,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:03:11,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:03:11,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:03:11,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:03:11,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:03:11,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:03:11,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:03:11,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:03:11,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:03:11,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:03:11,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:03:11,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:03:11,399 WARN L159 QuantifierPusher]: Ignoring assumption.